Fabrication and Micro/Nano Structure Control of High Entropy Alloys by Advanced Processing

• Project Area: High Entropy Alloys - Science of New Class of Materials Based on Elemental Multiplicity and Heterogeneity
• Project/Area Number: 18H05455
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Kyoto University
• Principal Investigator: 辻 伸泰 京都大学, 工学研究科, 教授 (30263213)
• Co-Investigator(Kenkyū-buntansha): 千葉 晶彦 東北大学, 金属材料研究所, 教授 (00197617) ; 飴山 惠 立命館大学, 理工学部, 教授 (10184243) ; 安田 秀幸 京都大学, 工学研究科, 教授 (60239762)
• Project Period (FY): 2018-06-29 – 2023-03-31
• Project Status: Granted (Fiscal Year 2020)
• Budget Amount: ¥186,810,000 (Direct Cost: ¥143,700,000、Indirect Cost: ¥43,110,000); Fiscal Year 2021: ¥38,220,000 (Direct Cost: ¥29,400,000、Indirect Cost: ¥8,820,000); Fiscal Year 2020: ¥35,620,000 (Direct Cost: ¥27,400,000、Indirect Cost: ¥8,220,000); Fiscal Year 2019: ¥32,240,000 (Direct Cost: ¥24,800,000、Indirect Cost: ¥7,440,000); Fiscal Year 2018: ¥42,640,000 (Direct Cost: ¥32,800,000、Indirect Cost: ¥9,840,000)
• Keywords: プロセス / 組織制御 / 凝固 / 粉末冶金 / 3Dプリンティング / X線CT / 超微細粒 / 調和組織 / 粉末治金

Outline of Annual Research Achievements

多成分状態図の中央近傍の化学組成を持つハイエントロピー合金は、高温でのエントロピー効果や多種類に及ぶ各元素間の引力／斥力相互作用、遅い原子拡散、大きな格子ひずみといった特徴が複雑に作用して、凝固時及びその後の加工・熱処理中に従来金属・合金とは大きく異なるミクロ組織形成を生じると考えられる。本計画研究は、凝固・鋳造、加工熱処理、粉末冶金、3D プリンティングという、４種類の重要プロセスを通じてハイエントロピー合金のナノ・ミクロ組織やマクロ形態の制御を行い、ハイエントロピー合金特有の組織形成過程と機構を明らかにするとともに、ナノ・ミクロ組織と種々の特性の相関関係を明らかにして、望ましい特性の合金を作製するためのプロセス指針を獲得することを目的とする。
2019年度には、前年度に構築した研究基盤を活用して、京大・辻、京大・安田、立命大・飴山、東北大・千葉が、それぞれ加工・熱処理、凝固・鋳造、粉末冶金、3D プリンティングの各プロセスを担当し、各研究室の研究協力者、ポスドク、大学院生とともに、研究室間の緊密な連携を取りつつ研究を推進した。J-PARC・ハルヨは研究協力者として加工熱処理中の中性子その場回折実験を補助した。領域全体に共通試料やデータを提供することによって、ハイエントロピー合金に関する新学術の創成に寄与するとともに、ハイエントロピー合金の実用化を見通した基礎的知見の蓄積を行なった。前年度それぞれ確立した実験環境・条件を用いてFCC単相構造を有するハイエントロピー合金の組織解析・特製解明に関する研究を深化させるとともに、高温材料として期待される高融点BCCハイエントロピー合金の研究にも着手した。

Current Status of Research Progress

1: Research has progressed more than it was originally planned.

Reason

2019年度は、以下の研究成果を得た。（１）放射光を用いてCrMnFeCoNi系の固液界面積などデンドライトの特徴と凝固パスに沿った固液の平衡関係を明らかにし、測定データに基づいて四元系でコングルーエント組成を見いだした。（２）CoCrFeMnNi FCCハイエントロピー合金およびHfNbTaTiZr BCCハイエントロピー合金の高温化高熱処理に伴う組織形成および特異な変形機構を明らかにした。（３）CoCrFeNiMn合金の調和組織制御を行い、一般の金属材料と同様に調和組織が形成され、室温と低温の引張試験で高強度と高靱性が両立することが明らかとなった。また、シナジー硬化現象が発現することが確認された。（４）電子ビーム積層造形装置を用いて優れた高温強度を有するHfMoNbTaTi合金のバルク体に対して種々の条件にてシングルビード実験を行い、ビード形状および組織観察を基に最適な造形条件について検討した。
得られた成果を、32件の学術雑誌論文、63件の学会発表（うち招待講演17件、国際学会30件）として公表した。発表した学術雑誌論文には、ネイチャーグループのScientific Reports誌への1件の論文、材料工学分野のリーディングジャーナルであるActa Materialia誌（IF=7.293）の4件、 Scripta Materialia誌（IF=4.539）の2件、Mater. Res. Lett.誌（IF=7.44）の1件の論文を含む。参画する各研究室の多くの学生と若手ポスドク研究員がハイエントロピー合金に関する研究を行い、先端的な研究を通じて若手人材育成にも貢献できた。
以上のように、当初予定通りに各プロセスを用いたハイエントロピー合金研究が順調に進展し、予想以上に多くの論文および学会発表として成果を発表できており、当初の計画以上に研究が進展している。

Strategy for Future Research Activity

京大・辻、京大・安田、立命大・飴山、東北大・千葉が、加工・熱処理、凝固・鋳造、粉末冶金、3D プリンティングの各プロセスを担当し、研究室間の緊密な連携を取りつつ研究を推進する。領域全体に共通試料やデータを提供することによって、ハイエントロピー合金に関する新学術の創成に寄与するとともに、ハイエントロピー合金の実用化を展望した基礎的知見の蓄積を行う。第２年度までに各プロセスで得られた結果をさらに発展させるとともに、プロセス（研究室）間で情報を交換し、共通する内容の討論を進化させて、ハイエントロピー合金の組織・特性制御をより包括的に明らかにしてゆく。
2020年度は、前年度それぞれが確立したプロセスを用いて以下の研究項目を実施する。それぞれのプロセスにより得られた知見を統合し、他班の成果も取り入れながら、優れた特製を有するハイエントロピー合金を作製するためのプロセス条件等の知見を蓄積する。具体的には、以下の研究項目を実施する。（１）放射光を利用したその場観察・測定により固液平衡や凝固組織の定量化を進め、測定データにもとづき構成元素が固液に等分配される偏析フリーHEAの探索と可能性を探究する。（２）加工熱処理により組織制御された単相ハイエントロピー合金の力学特性を明らかにするとともに、第二相が析出する場合など、複相組織化するプロセス条件を明らかにする。（３）CoCrFeNiAl合金、CrFeCoNi合金、CoCrMo系合金等について調和組織制御を行い、室温と低温での変形様式について詳細な検討を行い、双晶変形、応力誘起相変態、すべり変形に及ぼす調和組織の影響を明らかにする。（４）シングルビードの溶融部および母材において観察されたクラック形成について、実験とシミュレーションの両面からメカニズムと回避策を明らかにする。また、粉末原料を用いて造形実験を行い、組織・特性評価を行う。

Research Products

• [Int'l Joint Research] インド工科大学ハイデラバード校/インド科学大学(インド)
• [Int'l Joint Research] デンマーク工科大学(デンマーク)
• [Int'l Joint Research] スイス連邦工科大学ローザンヌ校(スイス)
• [Int'l Joint Research] ルンド大学(スウェーデン)
• [Int'l Joint Research] POSTECH/嶺南大学(韓国)
• [Int'l Joint Research]
• [Int'l Joint Research] デンマーク工科大学(デンマーク)
• [Int'l Joint Research] 東北大学(中国)
• [Int'l Joint Research] 嶺南大学(韓国)
• [Int'l Joint Research] インド工科大学ハイデラバード校/インド科学大学（バンガロール）(インド)
• [Journal Article] Unique high-temperature deformation dominated by grain boundary sliding in heterogeneous necklace structure formed by dynamic recrystallization in HfNbTaTiZr BCC refractory high entropy alloy (2020)
  • Author(s): Eleti Rajeshwar R.、Chokshi Atul H.、Shibata Akinobu、Tsuji Nobuhiro
  • Journal Title: Acta Materialia Volume: 183 Pages: 64-77
  • DOI: 10.1016/j.actamat.2019.11.001
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effect of Elemental Combination on Microstructure and Mechanical Properties of Quaternary Refractory Medium Entropy Alloys (2020)
  • Author(s): He Qian、Yoshida Shuhei、Yasuda Hideyuki、Tsuji Nobuhiro
  • Journal Title: MATERIALS TRANSACTIONS Volume: 61 Issue: 4 Pages: 577-586
  • DOI: 10.2320/matertrans.mt-mk2019003 10.2320/matertrans.MT-MK2019003
  • ISSN: 1345-9678, 1347-5320
  • Peer Reviewed / Open Access
• [Journal Article] Effect of Cobalt-Content on Mechanical Properties of Non-Equiatomic Co–Cr–Ni Medium Entropy Alloys (2020)
  • Author(s): Yoshida Shuhei、Ikeuchi Takuto、Bai Yu、Tsuji Nobuhiro
  • Journal Title: MATERIALS TRANSACTIONS Volume: 61 Issue: 4 Pages: 587-595
  • DOI: 10.2320/matertrans.mt-mk2019004 10.2320/matertrans.MT-MK2019004
  • ISSN: 1345-9678, 1347-5320
  • Peer Reviewed
• [Journal Article] Ultra-Grain Refinement of High Entropy Alloys (2020)
  • Author(s): YOSHIDA Shuhei、IKEUCHI Takuto、BHATTACHARJEE Tilak、BAI Yu、SHIBATA Akinobu、TSUJI Nobuhiro
  • Journal Title: J. Jpn. Soc. Powder Powder Metallurgy Volume: 67 Issue: 3 Pages: 113-120
  • DOI: 10.2497/jjspm.67.113
  • ISSN: 0532-8799, 1880-9014
  • Peer Reviewed
• [Journal Article] Characterization of Growing Dendrites in CrMnFeCoNi High-Entropy Alloy by Time-Resolved and <i>In-Situ</i> Tomography (2020)
  • Author(s): Nakano Keita、Narumi Taka、Morishita Kohei、Yasuda Hideyuki
  • Journal Title: MATERIALS TRANSACTIONS Volume: 61 Issue: 4 Pages: 596-604
  • DOI: 10.2320/matertrans.mt-mk2019006 10.2320/matertrans.MT-MK2019006
  • ISSN: 1345-9678, 1347-5320
  • Peer Reviewed
• [Journal Article] Unique deformation behavior and microstructure evolution in high temperature processing of HfNbTaTiZr refractory high entropy alloy (2019)
  • Author(s): Eleti Rajeshwar R.、Bhattacharjee Tilak、Shibata Akinobu、Tsuji Nobuhiro
  • Journal Title: Acta Materialia Volume: 171 Pages: 132-145
  • DOI: 10.1016/j.actamat.2019.04.018
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effect of elemental combination on friction stress and Hall-Petch relationship in face-centered cubic high / medium entropy alloys (2019)
  • Author(s): Yoshida Shuhei、Ikeuchi Takuto、Bhattacharjee Tilak、Bai Yu、Shibata Akinobu、Tsuji Nobuhiro
  • Journal Title: Acta Materialia Volume: 171 Pages: 201-215
  • DOI: 10.1016/j.actamat.2019.04.017
  • Peer Reviewed
• [Journal Article] Synergistic effect by Al addition in improving mechanical performance of CoCrNi medium-entropy alloy (2019)
  • Author(s): Lee Donghee、Agustianingrum Maya Putri、Park Nokeun、Tsuji Nobuhiro
  • Journal Title: Journal of Alloys and Compounds Volume: 800 Pages: 372-378
  • DOI: 10.1016/j.jallcom.2019.06.005
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Engineering heterogeneous microstructure by severe warm-rolling for enhancing strength-ductility synergy in eutectic high entropy alloys (2019)
  • Author(s): Reddy S.R.、Yoshida S.、Sunkari U.、Lozinko A.、Joseph J.、Saha R.、Fabijanic D.、Guo S.、Bhattacharjee P.P.、Tsuji N.
  • Journal Title: Materials Science and Engineering: A Volume: 764 Pages: 138226-138226
  • DOI: 10.1016/j.msea.2019.138226
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Nanostructuring with Structural-Compositional Dual Heterogeneities Enhances Strength-Ductility Synergy in Eutectic High Entropy Alloy (2019)
  • Author(s): Reddy S. R.、Yoshida S.、Bhattacharjee T.、Sake N.、Lozinko A.、Guo S.、Bhattacharjee P. P.、Tsuji N.
  • Journal Title: Scientific Reports Volume: 9 Pages: 11505-11505
  • DOI: 10.1038/s41598-019-47983-y
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Deformation microstructures and strength of face-centered cubic high/medium entropy alloys (2019)
  • Author(s): Yoshida Shuhei、Ikeuchi Takuto、Bai Yu、Shibata Akinobu、Hansen Niels、Huang Xiaoxu、Tsuji Nobuhiro
  • Journal Title: IOP Conference Series: Materials Science and Engineering Volume: 580 Pages: 012053-012053
  • DOI: 10.1088/1757-899x/580/1/012053
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Formation Mechanism of Ultrafine Grained Microstructures: Various Possibilities for Fabricating Bulk Nanostructured Metals and Alloys (2019)
  • Author(s): Tsuji Nobuhiro、Gholizadeh Reza、Ueji Rintaro、Kamikawa Naoya、Zhao Lijia、Tian Yanzhong、Bai Yu、Shibata Akinobu
  • Journal Title: MATERIALS TRANSACTIONS Volume: 60 Issue: 8 Pages: 1518-1532
  • DOI: 10.2320/matertrans.mf201936 10.2320/matertrans.MF201936
  • NAID: 130007683601
  • ISSN: 1345-9678, 1347-5320
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A 3D crystal plasticity model of monotonic and cyclic simple shear deformation for commercial-purity polycrystalline Ti with a harmonic structure (2019)
  • Author(s): Wang Xiang、Cazes Fabien、Li Jia、Hocini Azziz、Ameyama Kei、Dirras Guy
  • Journal Title: Mechanics of Materials Volume: 128 Pages: 117-128
  • DOI: 10.1016/j.mechmat.2018.10.006
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Unique Mechanical Properties of Harmonic Structure Designed Materials (2019)
  • Author(s): 飴山 惠，堀川直樹、川畑美絵
  • Journal Title: Journal of the Iron and Steel Institute of Japan Volume: 105 Issue: 2 Pages: 124-126
  • DOI: 10.2355/tetsutohagane.tetsu-2018-089 10.2355/tetsutohagane.TETSU-2018-089
  • NAID: 130007585447
  • ISSN: 0021-1575, 1883-2954
  • Peer Reviewed / Open Access
• [Journal Article] Comparative study on Ti-Nb binary alloys fabricated through spark plasma sintering and conventional P/M routes for biomedical application (2019)
  • Author(s): K.Rajamallu R.Archana J. Nivedhitha D.K.Pattanayak K.Ameyama S.R.Dey
  • Journal Title: Materials Science and Engineering: C Volume: Vol.94 Pages: 619-627
  • DOI: 10.1016/j.msec.2018.10.006
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Evaluation of Fatigue Properties under Four-point Bending and Fatigue Crack Propagation in Austenitic Stainless Steel with a Bimodal Harmonic Structure (2019)
  • Author(s): Shoichi Kikuchi, Yuta Nakatsuka, Yoshikazu Nakai, Masashi Nakatani, Mie Ota Kawabata, Kei Ameyama
  • Journal Title: Frattura ed Integrit&agrave; Strutturale Volume: 48 Pages: 545-553
  • DOI: 10.3221/igf-esis.48.52
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] In-situ observation of dislocation dynamics near heterostructured interfaces (2019)
  • Author(s): Zhou Hao、Huang Chongxiang、Sha Xuechao、Xiao Lirong、Ma Xiaolong、Hoeppel Heinz Werner、Goeken Mathias、Wu Xiaolei、Ameyama Kei、Han Xiaodong、Zhu Yuntian
  • Journal Title: Materials Research Letters Volume: 7 Pages: 376-382
  • DOI: 10.1080/21663831.2019.1616330
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Towards strength-ductility synergy through hierarchical microstructure design in an austenitic stainless steel (2019)
  • Author(s): Zheng Ruixiao、Liu Maowen、Zhang Zhe、Ameyama Kei、Ma Chaoli
  • Journal Title: Scripta Materialia Volume: 169 Pages: 76-81
  • DOI: 10.1016/j.scriptamat.2019.05.017
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Fatigue crack growth behavior in a harmonic structure designed austenitic stainless steel (2019)
  • Author(s): Zhou Gaobin、Ma Hantuo、Zhang Zhe、Sun Jing、Wang Xiaobin、Zeng Peng、Zheng Ruixiao、Chen Xu、Ameyama Kei
  • Journal Title: Materials Science and Engineering: A Volume: 758 Pages: 121-129
  • DOI: 10.1016/j.msea.2019.05.008
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A New Microstructure Design for High Performance Structure Metallic Materials (2019)
  • Author(s): Ameyama, K, Kawabata, M, and Sharma, B
  • Journal Title: Proc 40th Int Ocean Polar Eng Conf Volume: ISOPE, 15 Pages: 3868-3884
  • Peer Reviewed / Open Access
• [Journal Article] Effect of Bimodal Harmonic Structure on Fatigue Properties of Austenitic Stainless Steel under Axial Loading (2019)
  • Author(s): Shoichi KIKUCHI, Yuhei NUKUI, Yuta NAKATSUKA, Yoshikazu NAKAI, Masashi NAKATANI, Mie Ota KAWABATA, Kei AMEYAMA
  • Journal Title: International Journal of Fatigue Volume: 127 Pages: 222-228
  • DOI: 10.1016/j.ijfatigue.2019.06.016
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Corrosion behavior of harmonic structured 316L stainless steel in 3.21% NaCl and simulated body fluid solution (2019)
  • Author(s): Prabhat Kumar Rai, K. Mondal, Kei Ameyama, Koki Yagi, Shashank Shekhar
  • Journal Title: Journal of Materials Engineering and Performance Volume: 44 Pages: 7554-7580
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Advantages of architectured harmonic structure in structural performance (2019)
  • Author(s): Orlov Dmytro、Zhou Jinming、Hall Stephen、Ota-Kawabata Mie、Ameyama Kei
  • Journal Title: Materials Science and Engineering Volume: 580 Pages: 012019-012019
  • DOI: 10.1088/1757-899x/580/1/012019
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Development of strong and ductile metastable face-centered cubic single-phase high-entropy alloys (2019)
  • Author(s): Daixiu Wei, Xiaoqing Li, Stephan Schonecker, Jing Jiang, Won-Mi Choi, Byeong-Joo Lee, Hyoung Seop Kim, Akihiko Chiba, Hidemi Kato
  • Journal Title: Acta Materialia Volume: 181 Pages: 318-330
  • DOI: 10.1016/j.actamat.2019.09.050
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Microstructure evolution and mechanical property of a precipitation-strengthened refractory high-entropy alloy HfNbTaTiZr (2019)
  • Author(s): Yang Cheng、Aoyagi Kenta、Bian Huakang、Chiba Akihiko
  • Journal Title: Materials Letters Volume: 254 Pages: 46-49
  • DOI: 10.1016/j.matlet.2019.07.027
  • Peer Reviewed
• [Journal Article] Manipulating local heat accumulation towards controlled quality and microstructure of a Co-Cr-Mo alloy in powder bed fusion with electron beam (2019)
  • Author(s): Zhao Yufan、Koizumi Yuichiro、Aoyagi Kenta、Yamanaka Kenta、Chiba Akihiko
  • Journal Title: Materials Letters Volume: 254 Pages: 269-272
  • DOI: 10.1016/j.matlet.2019.07.078
  • Peer Reviewed
• [Journal Article] Microstructural control of alloy 718 fabricated by electron beam melting with expanded processing window by adaptive offset method (2019)
  • Author(s): Ding Xiao、Koizumi Yuichiro、Aoyagi Kenta、Kii Tadashi、Sasaki Nobuyuki、Hayasaka Yuichiro、Yamanaka Kenta、Chiba Akihiko
  • Journal Title: Materials Science and Engineering: A Volume: 764 Pages: 138058-138058
  • DOI: 10.1016/j.msea.2019.138058
  • Peer Reviewed
• [Journal Article] On microstructural homogenization and mechanical properties optimization of biomedical Co-Cr-Mo alloy additively manufactured by using electron beam melting (2019)
  • Author(s): Wei Daixiu、Anniyaer Ainiwaer、Koizumi Yuichiro、Aoyagi Kenta、Nagasako Makoto、Kato Hidemi、Chiba Akihiko
  • Journal Title: Additive Manufacturing Volume: 28 Pages: 215-227
  • DOI: 10.1016/j.addma.2019.05.010
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effect of Al content and cold rolling on the microstructure and mechanical properties of Al5Cr12Fe35Mn28Ni20 high-entropy alloy (2019)
  • Author(s): Elkatatny Sally、Gepreel Mohamed A.H.、Hamada Atef、Nakamura Koichi、Yamanaka Kenta、Chiba Akihiko
  • Journal Title: Materials Science and Engineering A Volume: 759 Pages: 380-390
  • DOI: 10.1016/j.msea.2019.05.056
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Comprehensive study on mechanisms for grain morphology evolution and texture development in powder bed fusion with electron beam of Co-Cr-Mo alloy (2019)
  • Author(s): Zhao Yufan、Koizumi Yuichiro、Aoyagi Kenta、Wei Daixiu、Yamanaka Kenta、Chiba Akihiko
  • Journal Title: Materialia Volume: 6 Pages: 100346-100346
  • DOI: 10.1016/j.mtla.2019.100346
  • Peer Reviewed
• [Journal Article] Simple method to construct process maps for additive manufacturing using a support vector machine (2019)
  • Author(s): Aoyagi Kenta、Wang Hao、Sudo Hideki、Chiba Akihiko
  • Journal Title: Additive Manufacturing Volume: 27 Pages: 353-362
  • DOI: 10.1016/j.addma.2019.03.013
  • Peer Reviewed
• [Journal Article] Novel Co-rich high performance twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) high-entropy alloys (2019)
  • Author(s): Daixiu Wei, Xiaoqing Li, Jing Jiang, Weicheng Heng, Yuichiro Koizumi, Won-Mi Choi, Byeong-Joo Lee, Hyoung Seop Kim, Hidemi Kato, Akihiko Chiba
  • Journal Title: Scripta Materialia Volume: 165 Pages: 39-43
  • DOI: 10.1016/j.scriptamat.2019.02.018
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Strength?ductility balance in an ultrafine-grained non-equiatomic Fe50(CoCrMnNi)50 medium-entropy alloy with a fully recrystallized microstructure (2019)
  • Author(s): Choi Minku、Ondicho Ibrahim、Park Nokeun、Tsuji Nobuhiro
  • Journal Title: Journal of Alloys and Compounds Volume: 780 Pages: 959-966
  • DOI: 10.1016/j.jallcom.2018.11.265
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effect of aluminum addition on solid solution strengthening in CoCrNi medium-entropy alloy (2019)
  • Author(s): Agustianingrum Maya Putri、Yoshida Shuhei、Tsuji Nobuhiro、Park Nokeun
  • Journal Title: Journal of Alloys and Compounds Volume: 781 Pages: 866-872
  • DOI: 10.1016/j.jallcom.2018.12.065
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Fretting wear mechanism for harmonic, non-harmonic and conventional 316L stainless steels (2019)
  • Author(s): Rai Prabhat K.、Shekhar S.、Yagi K.、Ameyama K.、Mondal K.
  • Journal Title: Wear Volume: 424-425 Pages: 23-32
  • DOI: 10.1016/j.wear.2019.02.005
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Molten pool behavior and effect of fluid flow on solidification conditions in selective electron beam melting (SEBM) of a biomedical Co-Cr-Mo alloy (2019)
  • Author(s): Zhao Yufan、Koizumi Yuichiro、Aoyagi Kenta、Wei Daixiu、Yamanaka Kenta、Chiba Akihiko
  • Journal Title: Additive Manufacturing Volume: 26 Pages: 202-214
  • DOI: 10.1016/j.addma.2018.12.002
  • Peer Reviewed
• [Journal Article] Mechanical and corrosion properties of CoCrFeNiTi-based high-entropy alloy additive manufactured using selective laser melting (2019)
  • Author(s): Fujieda Tadashi、Chen Meichuan、Shiratori Hiroshi、Kuwabara Kosuke、Yamanaka Kenta、Koizumi Yuichiro、Chiba Akihiko、Watanabe Seiichi
  • Journal Title: Additive Manufacturing Volume: 25 Pages: 412-420
  • DOI: 10.1016/j.addma.2018.10.023
  • Peer Reviewed
• [Journal Article] Effect of low temperature on tensile properties of AlCoCrFeNi2.1 eutectic high entropy alloy (2018)
  • Author(s): Bhattacharjee Tilak、Zheng Ruixiao、Chong Yan、Sheikh Saad、Guo Sheng、Clark Ian Thomas、Okawa Toshiro、Wani Irfan Samad、Bhattacharjee Pinaki Prasad、Shibata Akinobu、Tsuji Nobuhiro
  • Journal Title: Materials Chemistry and Physics Volume: 210 Pages: 207-212
  • DOI: 10.1016/j.matchemphys.2017.06.023
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Hot deformation behavior of CoCrFeMnNi FCC high entropy alloy (2018)
  • Author(s): Eleti Rajeshwar R.、Bhattacharjee Tilak、Zhao Lijia、Bhattacharjee Pinaki P.、Tsuji Nobuhiro
  • Journal Title: Materials Chemistry and Physics Volume: 210 Pages: 176-186
  • DOI: 10.1016/j.matchemphys.2017.06.062
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Simultaneous Strength-Ductility Enhancement of a Nano-Lamellar AlCoCrFeNi2.1 Eutectic High Entropy Alloy by Cryo-Rolling and Annealing (2018)
  • Author(s): Bhattacharjee T.、Wani I. S.、Sheikh S.、Clark I. T.、Okawa T.、Guo S.、Bhattacharjee P. P.、Tsuji N.
  • Journal Title: Scientific Reports Volume: 8
  • DOI: 10.1038/s41598-018-21385-y
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Possibility of Microstructure Control in High Entropy Alloys (2018)
  • Author(s): 辻 伸泰、朴 魯謹、李 翔、Rajeshwar, Reddy Eleti、吉田周平、Tilak Bhattacharjee、白 玉、Pinaki Prasad Bhattacharjee、黒川 修
  • Journal Title: Materia Japan Volume: 57 Issue: 7 Pages: 317-322
  • DOI: 10.2320/materia.57.317
  • NAID: 130007386676
  • ISSN: 1340-2625, 1884-5843
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effect of Cold Rolling and Heat-treatment on the Microstructure and Mechanical Properties of β Titanium Ti-25Nb-25Zr Alloy (2018)
  • Author(s): Sanjay Vajpai, Bhupendra Sharma, Mie Ota, Kei Ameyama
  • Journal Title: Materials Science and Engineering A Volume: 736 Pages: 323-328
  • DOI: 10.1016/j.msea.2018.09.002
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Improvement of Strength with Maintaining Ductility of Harmonic Structure Pure Copper by Cold Rolling and Annealing Process (2018)
  • Author(s): Guodong Li, Shuichi Morinaka, Mie Kawabata, Chaoli Ma, Kei Ameyama
  • Journal Title: Procedia Manufacturing Volume: 15 Pages: 1641-1648
  • DOI: 10.1016/j.promfg.2018.07.292
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Electron beam melting of boron-modified Ti?6Al?2Sn?4Zr?2Mo?0.1Si alloy with superior tensile strength and oxidation resistance at elevated temperatures (2018)
  • Author(s): Fujieda Tadashi、Cui Yujie、Aoyagi Kenta、Koizumi Yuichiro、Chiba Akihiko
  • Journal Title: Materialia Volume: 4 Pages: 367-372
  • DOI: 10.1016/j.mtla.2018.10.013
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Nitinol powders generate from Plasma Rotation Electrode Process provide clean powder for biomedical devices used with suitable size, spheroid surface and pure composition (2018)
  • Author(s): Hsu Tai-I、Wei Chia-Min、Wu Lu-Dien、Li Yun-Ping、Chiba Akihiko、Tsai Meng-Hsiu
  • Journal Title: Scientific Reports Volume: 8
  • DOI: 10.1038/s41598-018-32101-1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Heterogeneous microstructures and corrosion resistance of biomedical Co-Cr-Mo alloy fabricated by electron beam melting (EBM) (2018)
  • Author(s): Wei Daixiu、Koizumi Yuichiro、Chiba Akihiko、Ueki Kosuke、Ueda Kyosuke、Narushima Takayuki、Tsutsumi Yusuke、Hanawa Takao
  • Journal Title: Additive Manufacturing Volume: 24 Pages: 103-114
  • DOI: 10.1016/j.addma.2018.09.006
  • Peer Reviewed
• [Journal Article] Electron beam additive manufacturing of Inconel 718 alloy rods: Impact of build direction on microstructure and high-temperature tensile properties (2018)
  • Author(s): Sun Shi-Hai、Koizumi Yuichiro、Saito Tsuyoshi、Yamanaka Kenta、Li Yun-Ping、Cui Yujie、Chiba Akihiko
  • Journal Title: Additive Manufacturing Volume: 23 Pages: 457-470
  • DOI: 10.1016/j.addma.2018.08.017
  • Peer Reviewed
• [Journal Article] Mechanical and corrosion properties of AlCoCrFeNi high-entropy alloy fabricated with selective electron beam melting (2018)
  • Author(s): Kuwabara Kosuke、Shiratori Hiroshi、Fujieda Tadashi、Yamanaka Kenta、Koizumi Yuichiro、Chiba Akihiko
  • Journal Title: Additive Manufacturing Volume: 23 Pages: 264-271
  • DOI: 10.1016/j.addma.2018.06.006
  • Peer Reviewed
• [Journal Article] Creation of Innovative Structural Materials via Harmonic Structure Design (2018)
  • Author(s): 飴山 惠，中谷 仁，川畑美絵
  • Journal Title: J.FGMs Volume: 32 Issue: 0 Pages: 1-6
  • DOI: 10.14957/fgms.32.1
  • NAID: 130006394229
  • ISSN: 2188-3807
  • Peer Reviewed
• [Presentation] Ductility of Quaternary Refractory Medium Entropy Alloys with Body-centered Cubic Structure (2020)
  • Author(s): Qian He, Shuhei Yoshida, Tilak Bhattacharjee, Nobuhiro Tsuji
  • Organizer: TMS 2020 149th Annual Meeting & Exhibition
  • Int'l Joint Research
• [Presentation] Effect of elemental combination on microstructure and mechanical properties of quaternary refractory medium entropy alloys (2020)
  • Author(s): Qian He , Shuhei Yoshida, Hideyuki Yasuda, Nobuhiro Tsuji
  • Organizer: 日本金属学会 2020年春期（第166回）講演大会
• [Presentation] 高・中エントロピー合金における変形組織の方位依存性と力学特性の関係 (2020)
  • Author(s): 吉田周平, Fu Rui, Gong Wu, 池内琢人, Bai Yu, 柴田曉伸, Feng Zongqiang, Wu Guilin, Hansen Niels, Huang Xiaoxu, 辻伸泰
  • Organizer: 日本金属学会 2020年春期（第166回）講演大会
• [Presentation] Co20Cr40Ni40 Medium Entropy Alloyにおける圧延変形組織の発達とその結晶方位依存性 (2020)
  • Author(s): 山崎直人, 吉田周平, Bai Yu, Bhattacharjee Pinaki, 辻伸泰
  • Organizer: 日本金属学会 2020年春期（第166回）講演大会
• [Presentation] 4D-CTと回折X線によるCrMnFeCoNi合金のデンドライト成長における優先成長方位の測定 (2020)
  • Author(s): 中野敬太、鳴海大翔、安田秀幸
  • Organizer: 日本金属学会第166回講演大会
• [Presentation] Role of UFG-shell network on improving mechanical properties in harmonic structure material (2020)
  • Author(s): K.Ameyama
  • Organizer: TMS Annual Meeting & Exhibition
  • Int'l Joint Research / Invited
• [Presentation] Powder Metal Technology for High-performance Materials with Harmonic-structure (2020)
  • Author(s): K.Ameyama, D.Orlov
  • Organizer: TMS Annual Meeting & Exhibition
  • Int'l Joint Research / Invited
• [Presentation] Control of Microstructural Singularity for High Perfomance Metallic Materials (2020)
  • Author(s): K.Ameyama
  • Organizer: TMS Annual Meeting & Exhibition
  • Int'l Joint Research / Invited
• [Presentation] Harmonic Structure Design: Creation of Innovative High Performance Metallic Materials (2020)
  • Author(s): K.Ameyama
  • Organizer: The 10th?Pacific Rim International Conference on Advance Materials and Processing (PRICM 10)?
  • Int'l Joint Research / Invited
• [Presentation] Evaluation of misorientation and local deformation in bimodal harmonic structured stainless steel by hybrid imagings of diffraction and refraction contrast using synchrotron radiation X-ray (2020)
  • Author(s): Y. Nakai, S. Kikuchi, D. Shiozawa, K. Nonaka, T. Hase, Y. Nakagawa, K. Ameyama
  • Organizer: TMS Annual Meeting & Exhibition
  • Int'l Joint Research
• [Presentation] 電子ビーム積層造形による非溶接性Ni基超合金インコネル713ELCの割れメカニズム (2020)
  • Author(s): 卞 華康, 趙 宇凡, 崔 玉傑, 青柳 健大, 山中 謙太, 千葉 晶彦
  • Organizer: 日本金属学会 2020年春期講演大会
• [Presentation] 電子ビーム積層造形による非溶接性Ni基超合金インコネル713ELCの割れメカニズム (2020)
  • Author(s): 雷 雨超, 青柳 健大, 青田 欣也, 桑原 孝介, 千葉 晶彦
  • Organizer: 日本金属学会 2020年春期講演大会
• [Presentation] 粉末床溶融結合型電子ビーム積層造形におけるメルトプールの動的挙動 ― レーザー方式との比較 (2020)
  • Author(s): 趙 宇凡, 青柳 健大, 崔 玉傑, 卞 華康, 山中 謙太, 千葉 晶彦
  • Organizer: 日本金属学会 2020年春期講演大会
• [Presentation] Effect of Powder Quality on Defects Suppression in an Additively Manufactured Inconel 718 Alloy - Comparison between Gas Atomized and PREP powders (2020)
  • Author(s): 趙 宇凡, 青柳 健大, 台野 洋平, 山中 謙太, 千葉 晶彦
  • Organizer: 日本金属学会 2020年春期講演大会
• [Presentation] 電子ビーム積層造形における予熱過程のシミュレーション (2020)
  • Author(s): 青柳 健大, 工藤 貴浩, 千葉 晶彦
  • Organizer: 日本金属学会 2020年春期講演大会
• [Presentation] Eliminating Micro-cracking in Inconel 713ELC Fabricated by a Powder-bed-fusion Additive Manufacturing with Electron Beam (2020)
  • Author(s): Y. Lei, K. Aoyagi1, D.-S. Kang, K. Kuwabara, K. Aota, A. Chiba
  • Organizer: TMS2020
  • Int'l Joint Research
• [Presentation] Strengthening of Transformation-induced Plasticity-assisted High Entropy Alloy via Interstitial Nitrogen (2020)
  • Author(s): K. Yamanaka, M. Mori, Y. Onuki, S. Sato, A. Chiba
  • Organizer: TMS2020
  • Int'l Joint Research
• [Presentation] The Development of High Performance Hybrid High Entropy Alloys (HEAs) (2020)
  • Author(s): W. Heng, D. Wei, H. Kato, A. Chiba
  • Organizer: TMS2020
  • Int'l Joint Research
• [Presentation] マルチマテリアル化に向けた金属積層造形技術と表面形態制御 (2020)
  • Author(s): 千葉 晶彦
  • Organizer: 東北大学マルチマテリアル研究拠点 第2回シンポジウム
  • Int'l Joint Research / Invited
• [Presentation] Deformation Behaviors and Microstructure Evolution in HfNbTaTiZr High Entropy Alloy During Thermo-mechanical Processing at Elevated Temperatures (2019)
  • Author(s): Rajeshwar Reddy Eleti
  • Organizer: Beyond Nickel-Based Superalloys III
  • Int'l Joint Research
• [Presentation] Recrystallization behavior of high / medium entropy alloys deformed by high pressure torsion and subsequently annealed (2019)
  • Author(s): Yoshida S., Park N., Tsuji N.
  • Organizer: 7th International Conference on Recrystallization and Grain Growth (Rex&GG 2019)
  • Int'l Joint Research
• [Presentation] Recrystallization behavior of (CoCrMnNi)50Fe50 medium entropy alloy annealed at 600 °C (2019)
  • Author(s): Ondicho I.O., Shon J.H., Yoshida S., Tsuji N., Park N.
  • Organizer: 7th International Conference on Recrystallization and Grain Growth (Rex&GG 2019)
  • Int'l Joint Research
• [Presentation] Strength Ductility Balance in an Ultrafine-Grained Non-Equiatomic Fe50(CoCrMnNi)50 Medium-Entropy Alloy with a Fully Recrystallized Microstructure (2019)
  • Author(s): Nokeun Park, Minku Choi, Ibrahim Ondicho, Nobuhiro Tsuji
  • Organizer: 10th Pacific Rim International Conference on Advance Materials and Processing (PRICM 10)
  • Int'l Joint Research / Invited
• [Presentation] Linking local and heterogeneous deformation behavior to global deformation of materials by in-situ experimental techniques (2019)
  • Author(s): N. Tsuji, M. Park, S. Gao, Y. Bai, Y. Chong
  • Organizer: 40th Risoe International Symposium on Materials Science: Metal Microstructures in 2D, 3D and 4D
  • Invited
• [Presentation] Deformation microstructures and strength of face-centered cubic high/medium entropy alloys (2019)
  • Author(s): S. Yoshida, T. Ikeuchi, Y. Bai, A. Shibata, N. Hansen, X. Huang, N. Tsuji
  • Organizer: 40th Risoe International Symposium on Materials Science: Metal Microstructures in 2D, 3D and 4D
  • Int'l Joint Research
• [Presentation] Microstructural origin of high work-hardenability in ultrafine-grained CoCrNi medium entropy alloy (2019)
  • Author(s): Shuhei YOSHIDA, Genki YAMASHITA, Takuto IKEUCHI, Yu BAI, Akinobu SHIBATA, Nobuhiro TSUJI
  • Organizer: Materials Research Meeting 2019 (Symposium C-1 Fundamental Issues of Structural Materials)
  • Int'l Joint Research
• [Presentation] ハイエントロピー合金の結晶粒超微細化 (2019)
  • Author(s): 辻伸泰，吉田 周平，バイイ
  • Organizer: 粉体粉末冶金協会2 0 1 9 年度春季大会
• [Presentation] Co-Cr-Ni Medium Entropy Alloyの室温変形挙動と積層欠陥エネルギー，摩擦応力の関係 (2019)
  • Author(s): 池内 琢人，吉田 周平，BAI Yu，柴田 暁伸，辻 伸泰
  • Organizer: 日本金属学会2019秋季講演大会
• [Presentation] 完全再結晶超微細粒組織を有する高・中エントロピー合金の作製とその力学特性 (2019)
  • Author(s): 吉田 周平，朴 魯謹，辻 伸泰
  • Organizer: 日本金属学会2019秋季講演大会
• [Presentation] Effect of elements combination on ductility in refractory body-centered cubic medium entropy alloys with quaternary equimolar compositions (2019)
  • Author(s): He Qian，Yoshida Shuhei，Tsuji Nobuhiro
  • Organizer: 日本金属学会2019秋季講演大会
• [Presentation] 高・中エントロピー合金における変形組織発達 (2019)
  • Author(s): 吉田周平, 山崎直人, 池内琢人, Bai Yu, 柴田曉伸, Bhattacharjee Pinaki Prasad, Hansen Niels, Huang Xiaoxu, 辻伸泰
  • Organizer: 高温変形の組織ダイナミクス研究会「2019年度夏の学校」
• [Presentation] 加工熱処理によるハイエントロピー合金のナノ／ミクロ組織制御 (2019)
  • Author(s): 辻伸泰
  • Organizer: 日本金属学会シンポジウム ハイエントロピー合金の材料科学
  • Invited
• [Presentation] Fully Recrystallized Bulk Nanostructured Metals for Managing Both High Strength and Large Ductility (2019)
  • Author(s): Nobuhiro Tsuji
  • Organizer: Xi’an Jiaotong University, Frontier Institute of Science and Technology (FIST)
  • Invited
• [Presentation] Relationship between Local Heterogeneous Deformation Behaviors and Global Deformation of Materials (2019)
  • Author(s): Nobuhiro TSUJI, Myeong-Heom PARK, Si GAO, Yu BAI, Wenqi MAO, Akinobu SHIBATA
  • Organizer: 中国科学院・金属研究所（IMR, CAS）
  • Invited
• [Presentation] Relationship between Local Heterogeneous Deformation Behaviors and Global Deformation of Materials (2019)
  • Author(s): Nobuhiro TSUJI, Myeong-Heom PARK, Si GAO, Yu BAI, Wenqi MAO, Akinobu SHIBATA
  • Organizer: Northeastern University（中国・東北大学）、School of Materials Science & Engineering
  • Invited
• [Presentation] X線イメージングを利用したCrMnFeCoNiハイエントロピー合金の固液界面での分配係数のその場測定 (2019)
  • Author(s): 中野敬太、鳴海大翔、安田秀幸
  • Organizer: 日本金属学会 第165回秋季講演大会
• [Presentation] Cr-Mn-Fe-Co-Ni系合金の凝固現象 (2019)
  • Author(s): 安田秀幸、鳴海大翔、中野敬太、Luo Litian
  • Organizer: 日本金属学会 第165回秋季講演大会
  • Invited
• [Presentation] Unique Mechanical Properties of Harmonic Structure Designed Materials (2019)
  • Author(s): K.Ameyama
  • Organizer: TMS Annual Meeting & Exhibition
  • Int'l Joint Research / Invited
• [Presentation] Temperature Dependence of Harmonic Structure Designed SUS316L austenitic Stainless Steel Deformation (2019)
  • Author(s): Koki Yagi, Morihiro Hariki, Masashi Nakatani, Bhupendra Sharma, Mie Kawabata, Cinzia Menapace, Kei Ameyama
  • Organizer: The 10th Pacific Rim International Conference on Advance Materials and Processing (PRICM 11)?
  • Int'l Joint Research
• [Presentation] Deformation behavior of Harmonic Structure designed SUS316L Austenitic Stainless Steel at Elevated Temparatures (2019)
  • Author(s): Koki Yagi, Morihiro Hariki, Masashi Nakatani, Bhupendra Sharma, Mie Kawabata, Cinzia Menapace, Kei Ameyama
  • Organizer: European Congress and Exhibition on Advanced Materials and Processes (EUROMAT 2019)
  • Int'l Joint Research
• [Presentation] Hamonic Structure Design of Co-Cr-Mo Alloy and its Mechanical Properties (2019)
  • Author(s): Sho Matsumura, Bhupendra Sharma, Mie Kawabata, Kei Ameyama
  • Organizer: MRS conference YUCOMAT2019
  • Int'l Joint Research
• [Presentation] Improvement of Mechanical Properties of Harmonic Structure SUS304L by Thermo-mechanical Process (2019)
  • Author(s): Taishu Tsujino, Masashi Nakatani, Bhupendra Sharma, Mie Kawabata, Kei Ameyama
  • Organizer: MRS conference YUCOMAT2019
  • Int'l Joint Research
• [Presentation] Influence of Deformation Temperature on Mechanical Properties of Harmonic Structure Designed SUS316L Austenitic Stainless Steel (2019)
  • Author(s): Koki Yagi, Morihiro Hariki, Masashi Nakatani, Bhupendra Sharma, Mie Kawabata, Cinzia Menapace, Kei Ameyama
  • Organizer: Materials Research Meeting 2019 (MRM 2019)
  • Int'l Joint Research
• [Presentation] Mechanical Properties of Harmonic Structure Designed CrMnFeCoNi High Entropy Alloy (2019)
  • Author(s): Naoto Togawa、Sharma Bhupendra、Zhang Zhe、Mie Kawabata、Xu Chen、Kei Ameyama
  • Organizer: Materials Research Meeting 2019 (MRM 2019)
  • Int'l Joint Research
• [Presentation] CrMnFeCoNi高エントロピー合金調和組織制御材料の組織と機械的特性 (2019)
  • Author(s): 戸川直人、赤田英里、Sharma Bhupendra、ZhangZhe、川畑美絵、飴山恵
  • Organizer: 日本金属学会 2019年秋期(第165回)講演大会
• [Presentation] 革新的力学特性を示す調和組織材料の高次機能発現メカニズム (2019)
  • Author(s): 飴山惠
  • Organizer: 粉末冶金協会 2019年度春季（第123回）講演大会
• [Presentation] CrMnFeCoNi高エントロピー合金の調和組織制御 (2019)
  • Author(s): 赤田英里、戸川直人、Sharma Bhupendra、Zhang Zhe、川畑美絵、飴山恵
  • Organizer: 粉末冶金協会 2019年度秋季（第124回）講演大会
• [Presentation] Metal 3D Printer for Space Technology (2019)
  • Author(s): A. Chiba
  • Organizer: Global Institute for Materials Research, Tohoku (GIMRT), “Kibo” Users’ Network of JAXA (ISS-“Kibo”) and Aerospace Interdisciplinary Research Center of Tohoku University (AIRC)
  • Int'l Joint Research / Invited
• [Presentation] Behavior of metal powder by electron beam irradiation in electron beam additive manufacturing (2019)
  • Author(s): A. Chiba
  • Organizer: Sendai Albi Knowledge in Engineering Seminars (SAKES)
  • Int'l Joint Research / Invited
• [Presentation] Effects of powder characteristics on parts quality fabricated by using PBF type electron beam additive manufacturing - How does EBM differ from SLM? (2019)
  • Author(s): A. Chiba, K. Aoyagi, K. Yamanaka, Q. Li, Y. Zhao
  • Organizer: ICAMTMI 2019
  • Int'l Joint Research / Invited
• [Presentation] Additive manufacturing of an equiatomic AlCoCrFeNi high-entropy alloy with electron beam melting (2019)
  • Author(s): K. Yamanaka, H. Shiratori, T. Fujieda, K. Kuwabara, A. Chiba
  • Organizer: The 10th Pacific Rim International Conference on Advanced Materials and Processing (PRICM10)
  • Int'l Joint Research / Invited
• [Presentation] Microstructure prediction and evolution of a novel high entropy superalloy (HESA) at elevated temperature (2019)
  • Author(s): L. Ouyang, H. Bian, Y. Cui, K. Yamanaka, A. Chiba
  • Organizer: Summit of Materials Science (SMS) 2019
  • Int'l Joint Research
• [Presentation] Newly developed CoCrFeNiMox high-entropy alloys aided by CALPHAD methods (2019)
  • Author(s): J. Li, K. Yamanaka, K. Aoyagi, H. Bian, A. Chiba
  • Organizer: Summit of Materials Science (SMS) 2019
  • Int'l Joint Research
• [Presentation] Microstructure and strengthening mechanisms of a novel refractory high- entropy alloy HfMoNbTaTi (2019)
  • Author(s): C. Yang, H. Bian, K. Aoyagi, A. Chiba
  • Organizer: Summit of Materials Science (SMS) 2019
  • Int'l Joint Research
• [Presentation] 電子ビーム積層造形により作製した AlFeNiCoCrハイエントロピー合金の組織と材料特性 (2019)
  • Author(s): 山中 謙太, 白鳥 浩史, 藤枝 正, 桑原 孝介, 小泉 雄一郎, 千葉 晶彦
  • Organizer: 粉体粉末冶金協会 2019年度秋季大会
• [Presentation] HfMoNbTaTi 系ハイエントロピー合金の高温酸化挙動 (2019)
  • Author(s): 山中 謙太, 楊 程, 森 真奈美, 卞 華康, 青柳 健大, 千葉 晶彦
  • Organizer: 第5回材料WEEK
• [Presentation] 電子ビーム積層造形での電子ビーム照射による合金粉末の“スモーク”と合金粉末特性の関係 (2019)
  • Author(s): 千葉 晶彦, 青柳 健大, 山中 謙太
  • Organizer: 日本金属学会 2019年秋期講演大会
• [Presentation] 電子ビーム積層造形(EBM)によるNi基合金材料物性と造形性との相関 (2019)
  • Author(s): 久米井 康志, 青柳 健大, 千葉 晶彦
  • Organizer: 日本金属学会 2019年秋期講演大会
• [Presentation] Microstructure and mechanical property studies of a novel refractory high-entropy alloy HfMoNbTaTi (2019)
  • Author(s): 楊 程, 卞 華康, 青柳 健大, 千葉 晶彦
  • Organizer: 日本金属学会 2019年秋期講演大会
• [Presentation] Phase Transformation Mechanisms of Biomedical Co-28Cr-6Mo Alloy Depending on the Thermal History in Electron Beam Powder-bed Additive Manufacturing (2019)
  • Author(s): 趙 宇凡, 小泉 雄一郎, 青柳 健大, 山中 謙太, 千葉 晶彦
  • Organizer: 日本金属学会 2019年秋期講演大会
• [Presentation] The microstructure and mechanical properties of a high entropy superalloy at elevated temperatures (2019)
  • Author(s): 欧陽 凌霄, 卞 華康, 崔 玉傑, 山中 謙太, 青柳 健大, 千葉 晶彦
  • Organizer: 日本金属学会 2019年秋期講演大会
• [Presentation] データ科学手法を用いた純銅の電子ビーム積層造形プロセスの最適化 (2019)
  • Author(s): 青柳 健大, 渡邊 裕文, 澁谷 義孝, 佐藤 賢次, 千葉 晶彦
  • Organizer: 日本金属学会 2019年秋期講演大会
• [Presentation] Development of novel Co-rich high entropy alloys with superior tensile properties (2019)
  • Author(s): D. Wei, W. Heng, H. Kato, A. Chiba
  • Organizer: 粉体粉末冶金協会 2019年度春季大会
• [Presentation] Study on mechanical properties and microstructure of HfMoNbTaTi refractory high-entropy alloy (2019)
  • Author(s): ○楊程, 卞華康, 青柳健大, 千葉晶彦
  • Organizer: 日本金属学会2019年春期講演大会
• [Presentation] Effect of Elemental Combination on Friction Stress and Hall-Petch Relationship in Face-Centered Cubic High / Medium Entropy Alloys (2018)
  • Author(s): ○Shuhei Yoshida,Takuto Ikeuchi, Tilak Bhattacharjee, Yu Bai, Akinobu Shibata, Nobuhiro Tsuji
  • Organizer: 18th International Conference on the Strength of Materials (ICSMA18)
  • Int'l Joint Research
• [Presentation] Microstructure Control and Resultant Change in Mechanical Properties in High Entropy Alloys (2018)
  • Author(s): ◯Nobuhiro Tsuji, Tilak Bhattacharjee, Yu Bai, Nokeun Park, Shu Kurokawa, Pinaki Bhattacharjee, Rajeshwar Eleti, Shuhei Yoshida
  • Organizer: Materials Research Society (MRS) Fall Meeting 2018
  • Int'l Joint Research / Invited
• [Presentation] Thermo-mechanical processing strategies for managing strength-ductility in a nano-lamellar AlCoCrFeNi2.1 eutectic high entropy alloy (2018)
  • Author(s): ◯P.P. Bhattacharjee, T. Bhattacharjee, I.S. Wani, S.R. Reddy, S. Sheikh, S. Guo, N. Tsuji
  • Organizer: The 2nd International Conference on High-Entropy Materials (ICHM 2018)
  • Int'l Joint Research / Invited
• [Presentation] Hot Deformation Behaviors of HfNbTaTiZr Refractory High Entropy Alloy (2018)
  • Author(s): ◯Rajeshwar Reddy Eleti, Tilak Bhattacharjee, Nobuhiro Tsuji
  • Organizer: The 2nd International Conference on High-Entropy Materials (ICHM 2018)
  • Int'l Joint Research / Invited
• [Presentation] Effect of Co-contents on mechanical properties of non-equiatomic Co-Cr-Ni Medium entropy alloys (2018)
  • Author(s): ◯Takuto Ikeuchi, Shuhei Yoshida, Yu Bai, Nobuhiro Tsuji
  • Organizer: The 2nd International Conference on High-Entropy Materials (ICHM 2018)
  • Int'l Joint Research / Invited
• [Presentation] Possibility of Microstructure Control by Thermo-mechanically Controlled Processes in High Entropy Alloys (2018)
  • Author(s): ◯Nobuhiro Tsuji, Nokeun Park, Tilak Bhattacharjee, Shuhei Yoshida, Rajeshwar Eleti, Yu Bai, Shu Kurokawa, Pinaki Bhattacharjee
  • Organizer: TMS 2019 148th Annual Meeting & Exhibition
  • Int'l Joint Research / Invited
• [Presentation] ハイエントロピー合金におけるミクロ組織制御の可能性 (2018)
  • Author(s): ○辻 伸泰
  • Organizer: 日本金属学会2018秋期講演大会
  • Invited
• [Presentation] High / Medium entropy alloyの摩擦応力に及ぼす元素の組合せの影響 (2018)
  • Author(s): ○吉田周平，池内琢人，BHATTACHARJEE Tilak，BAI Yu，柴田曉伸，辻 伸泰
  • Organizer: 日本金属学会2018秋期講演大会
• [Presentation] ハイエントロピー合金とその可能性 (2018)
  • Author(s): ○辻 伸泰
  • Organizer: 日本金属学会若手研究グループ 第２回研究会 「多様な先端観察・測定法を用いた組織の定量と力学特性解析への適用」
  • Invited
• [Presentation] 新しい材料設計：ハイエントロピー合金 (2018)
  • Author(s): 乾 晴行，辻 伸泰
  • Organizer: 京都大学アカデミックデイ2018
• [Presentation] 調和組織制御されたFe-0.3mass%炭素鋼の熱処理による組織変化と力学特性 (2018)
  • Author(s): 堀憲太，川畑美絵，飴山惠
  • Organizer: 日本鉄鋼協会第176回秋季講演大会
• [Presentation] 電子ビーム積層造形を用いて作製したTi-6Al-4V合金の耐食性に及ぼす造形後熱処理の影響 (2018)
  • Author(s): ○山中謙太, 森真奈美, 千葉晶彦
  • Organizer: 粉体粉末冶金協会平成30年度秋季大会
• [Presentation] In-situ Synchrotron X-ray Diffraction Line-profile Analysis during Tensile Deformation in Additively Manufactured Ti-6Al-4V Alloy (2018)
  • Author(s): ○K. Yamanaka, A. Kuroda, M. Itoh, M. Mori, T. Shobu, S. Sato, A. Chiba
  • Organizer: MS&T 2018
  • Int'l Joint Research
• [Presentation] Effect of gamma-phase stability on the property of Co-Ni-based high-entropy superalloys with varying Ni contents (2018)
  • Author(s): ○李家翔, 小泉雄一郎, 青柳健大, 山中謙太, 千葉晶彦
  • Organizer: 日本金属学会2018年秋期講演大会
• [Presentation] Grain Morphology and Texture Formation in a Co-Cr-Mo Alloy Fabricated by Electron Beam Melting (2018)
  • Author(s): ○趙宇凡, 小泉雄一郎, 青柳健大, 千葉晶彦
  • Organizer: 日本金属学会2018年秋期講演大会
• [Presentation] 電子ビーム積層造形における残留応力および「スモーク」を同時に除去するための予熱温度制御技術の探索 (2018)
  • Author(s): ○千葉晶彦, 青柳健大, 山中謙太
  • Organizer: 日本金属学会2018年秋期講演大会
• [Presentation] PREP 法による金属積層造形用球状粉末の作製技術 (2018)
  • Author(s): ○王昊, 若生公郎, 佐藤司, 青柳健大, 山中謙太, 千葉晶彦
  • Organizer: 日本金属学会2018年秋期講演大会
• [Presentation] Study on mechanical properties and microstructure of high-entropy alloys with high melting point (2018)
  • Author(s): ○楊程, 青柳健大, 千葉晶彦
  • Organizer: 日本金属学会2018年秋期講演大会
• [Presentation] Application of TMP to Harmonic Structure Designed Materials (2018)
  • Author(s): ○K.Ameyama, M.Nakatani, M.O.Kawabata, G.Dirras
  • Organizer: International Conference on PROCESSING & MANUFACTURING OF ADVANCED MATERIALS
  • Int'l Joint Research / Invited
• [Presentation] Microstructure evolution of commercially pure titanium during electron beam additive manufacturing (2018)
  • Author(s): ○K. Yamanaka, M. Mori, S. Sato, A. Chiba
  • Organizer: THERMEC' 2018
  • Int'l Joint Research / Invited
• [Book] ハイエントロピー合金 (2020)
  • Author(s): 乾 晴行編著；飴山 恵、辻 伸泰、安田秀幸、吉田周平
  • Total Pages: 296
  • Publisher: 内田老鶴圃
  • ISBN: 9784753651375
• [Remarks] 京都大学 辻研究室
  • URL: http://www.tsujilab.mtl.kyoto-u.ac.jp
• [Remarks] 京都大学 安田研究室
  • URL: http://cast.mtl.kyoto-u.ac.jp
• [Remarks] 立命館大学 飴山研究室
  • URL: http://www.amelab.se.ritsumei.ac.jp
• [Remarks] 東北大学金属材料研究所 千葉研究室
  • URL: http://www.chibalab.imr.tohoku.ac.jp
• [Remarks] 京都大学 辻研究室
  • URL: http://www.tsujilab.mtl.kyoto-u.ac.jp/