Elucidation of abnormal phenomena of elongation increase induced by He in metal

• Project/Area Number: 15K06423
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Physical properties of metals/Metal-base materials
• Research Institution: Kyoto University
• Principal Investigator: Xu Qiu 京都大学, 原子炉実験所, 准教授 (90273531)
• Co-Investigator(Kenkyū-buntansha): 張 倹 京都大学, 原子炉実験所, 技術職員 (30379010)
• Research Collaborator: LUO Laima 合肥工業大学, 准教授 ; CAO Xingzhong 高エネルギー物理研究所, 准教授 ; WANG Yuxia 復旦大学, 准教授
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: 鉄 / 力学特性 / 転位 / 原子空孔 / ヘリウム / 水素 / 脆化 / ヘリウム注入 / 金属 / 欠陥 / 引張強度

Outline of Final Research Achievements

He atoms are insoluble in most metals, and the presence of He atoms in metals decreases the ductility. Recently, however, Xu et al. indicated that He implantation increased the total elongation of pure Fe and Ni containing only dislocations. In order to understand the mechanism of this phenomenon, the interaction between He atoms and defects in Fe was investigated. He atoms were trapped at the dislocations in Fe containing only dislocations when He was implanted. The He atoms were once released from the dislocation during tension and were trapped again at vacancies induced by tension. Therefore, vacancy aggregation, in other words, the nucleation and growth of cracks were suppressed. As a result, elongation increased. By this method, hydrogen embrittlement in iron is also reduced.

Research Products

• [Int'l Joint Research] 合肥工業大学/中国科学院高エネルギー物理研究所/復旦大学(中国)
• [Journal Article] Repair Behavior of He-Irradiated W-Y2O3 Composites after Different Temperature-Isochronal Annealing Experiments (2018)
  • Author(s): G. Yao, X.Y. Tan, L.M. Luo, X. Zan, J.Q. Liu, Q. Xu, X.Y. Zhu, Y.C. Wu
  • Journal Title: Nuclear Inst. and Methods in Physics Research B Volume: 415 Pages: 82-88
  • DOI: 10.1016/j.nimb.2017.11.013
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Deuterium Trapping at Vacancy Clusters in Electron/Neutron-Irradiated Tungsten Studied by Positron Annihilation Spectroscopy (2018)
  • Author(s): T. Toyama, K. Ami, K. Inoue, Y. Nagai, K. Sato, Q. Xu, Y. Hatano
  • Journal Title: Journal of Nuclear Materials Volume: 499 Pages: 464-470
  • DOI: 10.1016/j.jnucmat.2017.11.002
  • Peer Reviewed
• [Journal Article] Microstructure and Damage Behavior of W-Cr Alloy under He Irradiation (2018)
  • Author(s): K. Huang, L.M. Luo, X. Zan, Q. Xu, D.G. Liu, X.Y. Zhu, J.G. Cheng, Y.C. Wu
  • Journal Title: Journal of Nuclear Materials Volume: 501 Pages: 181-188
  • DOI: 10.1016/j.jnucmat.2018.01.019
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Microstructure and Helium Irradiation Performance of W-ZrC/Sc2O3 Composites Prepared Spark Plasma Sintering (2018)
  • Author(s): H.Y. Chen, L.M. Luo, X. Zan, Q. Xu, X.Y. Zhu, J.Q. Liu, J.G. Cheng, Y.C. Wu
  • Journal Title: International Journal of Refractory Metals & Hard Materials Volume: 72 Pages: 373-379
  • DOI: 10.1016/j.ijrmhm.2018.01.011
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Influence of Nb Content on the Microstructure and Deuterium Retention of W-Nb Alloys (2018)
  • Author(s): L.M. Luo, J.B. Chen, J.S. Lin, X. Zan, X.Y. Zhu, Q. Xu, Y.C. Wu
  • Journal Title: Fusion Engineering and Design Volume: 129 Pages: 120-129
  • DOI: 10.1016/j.fusengdes.2018.02.085
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Charaterization of Helium-Vacancy Complexes in He-Ions Implanted Fe9Cr by using Positron Annihilation Spectroscopy (2018)
  • Author(s): T. Zhu, S.X. Jin, P. Zhang, L.G. Song, X.Y. Lian, P. Fan, Q.L. Zhang, D.Q. Yuan, H.B. Wu, R.S. Yu, X.Z. Cao, Q. Xu, B.Y. Wang
  • Journal Title: Journal of Nuclear Materials Volume: 505 Pages: 69-72
  • DOI: 10.1016/j.jnucmat.2018.03.048
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Novel Methods for Prevention of Hydrogen Embrittlement in Iron (2017)
  • Author(s): Q. Xu, J. Zhang
  • Journal Title: Scientific Reports Volume: 7 Issue: 1 Pages: 16927-16927
  • DOI: 10.1038/s41598-017-17263-8
  • Peer Reviewed / Open Access
• [Journal Article] D2 Retention and Microstructural Evolution during He Irradiation in Candidate Plasma Facing Material W-La2O3 Alloy (2017)
  • Author(s): Q. Xu, X.Y. Ding, L.M. Luo, M. Miyamoto, M. Tokitani, J. Zhang, Y.C. Wu
  • Journal Title: Journal of Nuclear Materials Volume: 496 Pages: 227-233
  • DOI: 10.1016/j.jnucmat.2017.09.033
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Microstructural Evolution and Changes in Mechanical Property of Irradiated Fe-0.6Cu Alloy under Uniaxial Tension Stress in Reactor (2017)
  • Author(s): Q. Xu, T. Yokotani, J. Zhang
  • Journal Title: Radiation Effects & Defects in Solids Volume: 172 Issue: 3-4 Pages: 305-312
  • DOI: 10.1080/10420150.2017.1313842
  • Peer Reviewed
• [Journal Article] Microstructure and Deuterium Retention after Ion Irradiation of W-Lu2O3 Composites (2017)
  • Author(s): J.S. Lin, L.M. Luo, Q. Xu, X. Zan, X.Y. Zhu, Y.C. Wu
  • Journal Title: Journal of Nuclear Materials Volume: 490 Pages: 272-278
  • DOI: 10.1016/j.jnucmat.2017.04.042
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The Influence of Dislocation and Hydrogen on Thermal Helium Desoption Behavior in Fe9Cr Alloys (2017)
  • Author(s): T. Zhu, S.X. Jin, Y.H. Gong, E.Y. Lu, L.G. Song, Q. Xu, L.P. Guo, X.Z. Cao, B.Y. Wang
  • Journal Title: Journal of Nuclear Materials Volume: 495 Pages: 244-248
  • DOI: 10.1016/j.jnucmat.2017.08.027
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Quantitative Evaluation of Hydrogen Atoms Trapped at Single Vacancies in Tungsten using Positron Annihilation lifetime Measurements: Experiments and Theoretical Calculations (2017)
  • Author(s): K .Sato, A. Hirosako, K. Ishibashi, Y. Miura, Q. Xu, M. Onoue, Y. Fukutoku, T. Onitsuka, M. Hatakeyama, S. Sunada, T. Yoshiie
  • Journal Title: Journal of Nuclear Materials Volume: 496 Pages: 9-17
  • DOI: 10.1016/j.jnucmat.2017.09.002
  • Peer Reviewed / Open Access
• [Journal Article] Effects of He, D Interaction on Thermal Desorption of He and D2 and Microstructural Evolution in Pure Fe (2016)
  • Author(s): Q. Xu, J. Zhang
  • Journal Title: J. Nucl. Mater. Volume: 479 Pages: 255-259
  • DOI: 10.1016/j.jnucmat.2016.07.032
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Retention and Thermal Desorption of Helium in Pure Tungsten (2016)
  • Author(s): Q. Xu, J. Zhang, K. Maejima, N. Hirashita
  • Journal Title: Phil. Mag. Lett. Volume: 96 Pages: 477-481
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Electrical resistivity measurement of Fe-0.6%Cu alloy irradiated by neutrons at 14-19 K (2016)
  • Author(s): Q. Xu, T. Yokotani, K. Sato, F. Hori
  • Journal Title: Journal of Nuclear Materials Volume: 481 Pages: 176-180
  • DOI: 10.1016/j.jnucmat.2016.09.023
  • Peer Reviewed
• [Journal Article] Synchrotron VUV-UV and Positron Lifetime Spectroscopy Study of Vacancy-Type Defects in Reactor Neutron-Irradiated MgO・nAl2O3 n(=2) (2016)
  • Author(s): A.Z.M.S. Rahman, X.Z. Cao, B.Y. Wang, J. Evslin, Q. Xu, K. Atobe
  • Journal Title: Cogent Physics Volume: 3 Issue: 1 Pages: 1133481-1133481
  • DOI: 10.1080/23311940.2015.1133481
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Subcascade Formation Ratio in Neutron-Irradiated Stainless Steels (2016)
  • Author(s): T. Yoshiie, Y. Satoh, S.S. Huang, M. Horiki, K. Sato, Q. Xu
  • Journal Title: J. Phys. C Volume: 674 Pages: 012002-012002
  • DOI: 10.1088/1742-6596/674/1/012002
  • Peer Reviewed
• [Journal Article] Ni Ion Damage Structures and Hardness Changes in Austenitic Stainless Steels and Their Model Alloys (2016)
  • Author(s): K. Sato, S. Ishioka, Q. Xu, T. Yoshiie, H. Tsuchida, A. Itoh
  • Journal Title: J. Phys. C Volume: 674 Pages: 012009-012009
  • DOI: 10.1088/1742-6596/674/1/012009
  • Peer Reviewed
• [Journal Article] Electron Irradiation-Induced Defects in Mo-Diluted FeCrNi Austenitic Alloy during Void Swelling Incubation (2016)
  • Author(s): B.Y. Wang, E.Y. Lu, C.X. Zhang, Q. Xu, S.X. Jin, P. Zhang, X.Z. Cao
  • Journal Title: J. Phys. C Volume: 674 Pages: 012010-012010
  • DOI: 10.1088/1742-6596/674/1/012010
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Laser Excited Novel Near-Infrared Photoluminescence Bands in Fast Neutron-Irradiated MgO・nAl2O3 (2016)
  • Author(s): A.Z.M.S. Rahman, A.S.M.A. Haseeb, Q. Xu, J. Evslin, M. Cinausero
  • Journal Title: Radiat. Phys. Chem. Volume: 125 Pages: 122-126
  • DOI: 10.1016/j.radphyschem.2016.04.001
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effects of Cr and W on defects evolution in irradiated F82H model alloys (2016)
  • Author(s): S.S. Huang, Q. Xu, T. Yoshiie
  • Journal Title: Materials Letters Volume: 178 Pages: 272-275
  • DOI: 10.1016/j.matlet.2016.05.019
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Properties of Lu2O3 Doped Tungsten and Thermal Shock Performance (2016)
  • Author(s): S. Wang, J. Zhang, L.M. Luo, X. Zan, Q. Xu, X.Y. Zhu, K. Tokunaga, Y.C. Wu
  • Journal Title: Powder Technol. Volume: 301 Pages: 65-69
  • DOI: 10.1016/j.powtec.2016.05.056
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effects of Zirconium Element on the Microstructure and Deuterium Retention of W-Zr/Sc2O3 Composites (2016)
  • Author(s): H.Y. Chen, L.M. Luo, J.B. Chen, X. Zan, X.Y. Zhu, Q. Xu, G.N. Luo, J.L. Chen, Y.C. Wu
  • Journal Title: Sci. Rep. Volume: 6 Issue: 1 Pages: 32678-32678
  • DOI: 10.1038/srep32678
  • NAID: 120006840156
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Microstructure and Performance of Rare Earth Element-Strengthened Plasma-Facing Tungsten Material (2016)
  • Author(s): L.M. Luo, J. Shi, J.S. Lin, X. Zan, X.Y. Zhu, Q. Xu, Y.C. Wu
  • Journal Title: Sci. Rep. Volume: 6 Issue: 1 Pages: 32701-32701
  • DOI: 10.1038/srep32701
  • NAID: 120006345017
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Effect of Dislocations on Helium Retention in Deformed Pure Iron (2016)
  • Author(s): Y.H. Gong, X.Z. Cao, S.X. Jin, E.Y. Lu, Y.C. Hu, T. Zhu, P. Kuang, Q. Xu, B.Y. Wang
  • Journal Title: J. Nucl. Mater. Volume: 482 Pages: 93-98
  • DOI: 10.1016/j.jnucmat.2016.10.014
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Investigation of Microstructure and Irradiation Behavior of W-Nb/Ti Composites Prepared by Spark Plasma Sintering (2016)
  • Author(s): J.B. Chen, L.M. Luo, M.L. Zhao, Q. Xu, X. Zan, Y.C. Wu
  • Journal Title: Fusion Eng. Des. Volume: 112 Pages: 349-354
  • DOI: 10.1016/j.fusengdes.2016.07.003
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Damage Behavior of REE-Doped W-Based Material Exposed to High-Flux Transient Heat Loads (2016)
  • Author(s): J. Shi, L.M. Luo, J.S. Lin, X. Zan, X.Y. Zhu, Q. Xu, Y.C. Wu
  • Journal Title: Fusion Eng. Des. Volume: 113 Pages: 92-101
  • DOI: 10.1016/j.fusengdes.2016.11.005
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Detection of Deuterium Sites in Tungsten by Thermal Desorption Spectroscopy and Positron Annihilation Spectroscopy (2016)
  • Author(s): K. Sato, R. Tamiya, Q. Xu, H. Tsuchida, T. Yoshiie
  • Journal Title: Nucl. Mater. Energ. Volume: 9 Pages: 554-559
  • DOI: 10.1016/j.nme.2016.09.014
  • Peer Reviewed
• [Journal Article] Effect of Second-Phase Particles on the Properties of W-Based Materials under High-Heat Loading (2016)
  • Author(s): X.Y. Tan, P. Li, L.M. Luo, Q. Xu, K. Tokunaga, X. Zan, Y.C. Wu
  • Journal Title: Nucl. Mater. Energ. Volume: 9 Pages: 399-404
  • DOI: 10.1016/j.nme.2016.07.009
  • NAID: 120005997678
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Irradiation Damage from Low-Dose High-Energy Protons on Mechanical Properties and Positron Annihilation Lifetimes of Fe-9Cr alloy (2016)
  • Author(s): Q. Xu, K. Fukumoto, Y. Ishi, Y. Kuriyama, T. Uesugi, K. Sato, Y. Mori, T. Yoshiie
  • Journal Title: Journal of Nuclear Materials Volume: 468 Pages: 260-263
  • DOI: 10.1016/j.jnucmat.2015.07.011
  • Peer Reviewed
• [Journal Article] The Tolerance of Ti3SiC2 to Hydrogen-Induced Embrittlement: A First Principles Calculation (2016)
  • Author(s): H.F. Zhang, B.D. Yao, J.Y. Zhang, Q. Xu, Y.J. Feng, Y.X.Wang
  • Journal Title: Materials Letters Volume: 166 Pages: 93-96
  • DOI: 10.1016/j.matlet.2015.12.021
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Defect Structures of F82H Irradiated at SINQ Using Positron Annihilation Spectroscopy (2016)
  • Author(s): K. Sato, K. Ikemura, V. Krsjak, C. Vieh, R. Brun, Q. Xu, T. Yoshiie, Y. Dai
  • Journal Title: Journal of Nuclear Materials Volume: 468 Pages: 281-284
  • DOI: 10.1016/j.jnucmat.2015.03.055
  • Peer Reviewed / Int'l Joint Research
• [Presentation] B2型金属間化合物中の欠陥における水素捕獲 (2018)
  • Author(s): 角倉優雅、鷹野陽弘、岩瀬彰宏、Q. Xu、大澤一人、堀史説
  • Organizer: 金属学会
• [Presentation] γ線照射還元法を用いた多元系金属ナノ微粒子の合成 (2017)
  • Author(s): 戸田晋太郎、田中元彬、岩瀬彰宏、田口昇、田中真悟、徐ぎゅう、堀史説
  • Organizer: 第160回金属学会
  • Place of Presentation: 首都大学東京南大沢キャンパス
  • Year and Date: 2017-03-15
• [Presentation] ZnOバルク単結晶へのガンマ線照射効果：低抵抗化の起源 (2017)
  • Author(s): 田代 惇也, 取田 祐樹, 栗山 一男, 串田 一雅, 徐 ぎゅう, 木野村 淳
  • Organizer: 第６４回応用物理学会
  • Place of Presentation: パシフィコ横浜
  • Year and Date: 2017-03-14
• [Presentation] 電子線照射FeAl金属間化合物中の空孔による水素捕獲 (2017)
  • Author(s): 上野陽平、岩瀬彰宏、徐ぎゅう、佐藤紘一、大澤一人、河裾厚男、前川雅樹、斎藤勇一、堀史説
  • Organizer: 第51回KUR学術講演会
  • Place of Presentation: 京大・原子炉
• [Presentation] KUR B1孔を利用した低速陽電子ビームライン輝度増強部の開発 (2017)
  • Author(s): 葛谷佳広、大島永康、木野村淳、籔内敦、佐藤紘一、徐ぎゅう
  • Organizer: 第51回KUR学術講演会
  • Place of Presentation: 京大・原子炉
• [Presentation] ヘリウムによるニッケル、鉄の引張特性への影響 (2016)
  • Author(s): 徐 ぎゅう
  • Organizer: 金属学会
  • Place of Presentation: 東京理科大学葛飾キャンパス(東京都葛飾区)
  • Year and Date: 2016-03-23
• [Presentation] 原子力先進材料における高エネルギー粒子線の照射効果 (2016)
  • Author(s): 徐 ぎゅう
  • Organizer: 京都大学原子炉実験所第50回学術講演会
  • Place of Presentation: 京都大学原子炉実験所(大阪府熊取町)
  • Year and Date: 2016-01-27
• [Presentation] 昇温脱離ガス分析法を用いたタングステンの重水素トラッピングサイトの検出 (2016)
  • Author(s): 佐藤 紘一、田宮 怜、徐 ぎゅう、土田 秀次、義家 敏正
  • Organizer: 京都大学原子炉実験所第50回学術講演会
  • Place of Presentation: 京都大学原子炉実験所(大阪府熊取町)
  • Year and Date: 2016-01-27
• [Presentation] 鉄クロム合金の相分離に与える電子線照射の影響 (2016)
  • Author(s): 鬼塚 貴志、佐藤 紘一、徐 ぎゅう、福元 謙一
  • Organizer: 京都大学原子炉実験所第50回学術講演会
  • Place of Presentation: 京都大学原子炉実験所(大阪府熊取町)
  • Year and Date: 2016-01-27
• [Presentation] FeAl 金属間化合物への電子線照射による欠陥生成のエネルギー依存性 (2016)
  • Author(s): 上野 陽平、小林 一基、石山 大志、谷 真海、大澤 一人、岩瀬 彰宏、徐 ぎゅう、佐藤 紘一、堀 史説
  • Organizer: 京都大学原子炉実験所第50回学術講演会
  • Place of Presentation: 京都大学原子炉実験所(大阪府熊取町)
  • Year and Date: 2016-01-27
• [Remarks] 鉄の水素脆化防止の新しい手法を提案
  • URL: http://www.rri.kyoto-u.ac.jp/archives/9903