Microstructure control of biomedical Co-Cr alloy by introducing high density of lattice defects

• Project/Area Number: 26870050
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Material processing/Microstructural control engineering; Structural/Functional materials
• Research Institution: Tohoku University
• Principal Investigator: Yamanaka Kenta 東北大学, 金属材料研究所, 助教 (30727061)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 生体用Co-Cr合金 / 熱間加工 / 転位組織 / 放射光回折 / ラインプロファイル解析 / マルテンサイト変態 / 力学特性

Outline of Final Research Achievements

In this study, we present a novel concept for strengthening biomedical Co-Cr alloys by introducing high density of lattice defects. A high tensile/fatigue strength was obtained in Co-Cr-Mo alloy specimens prepared with multipass hot rolling. Using X-ray diffraction line profile analysis, we demonstrated that the overall strengthening achieved in the proposed process cannot be explained by considering grain refinement and dislocation densities and revealed a significant contribution of stacking faults in the developed alloys.

Research Products

• [Int'l Joint Research] INSA Lyon(France)
• [Int'l Joint Research] The University of British Columbia(Canada)
• [Int'l Joint Research] Indonesian Institute of Sciences(Indonesia)
• [Int'l Joint Research] INSA Lyon(フランス)
• [Int'l Joint Research] The University of British Columbia(カナダ)
• [Int'l Joint Research] Indonesian Institute of Sciences(インドネシア)
• [Journal Article] Continuous Measurements of Recrystallization and Grain Growth in Cobalt Super Alloys (2017)
  • Author(s): Mahsa Keyvani, Thomas Garcin, Damien Fabregue, Matthias Militzer, Kenta Yamanaka, Akihiko Chiba
  • Journal Title: Metallurgical and Materials Transactions A Volume: 48 Issue: 5 Pages: 2363-2374
  • DOI: 10.1007/s11661-017-4027-8
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Development of microstructure and mechanical properties during annealing of a cold-swaged Co-Cr-Mo alloy rod (2016)
  • Author(s): Manami Mori, Nanae Sato, Kenta Yamanaka, Kazuo Yoshida, Koji Kuramoto, Akihiko Chiba
  • Journal Title: Journal of the Mechanical Behavior of Biomedical Materials Volume: 64 Pages: 187-198
  • DOI: 10.1016/j.jmbbm.2016.07.009
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Cold-rolling behavior of biomedical Ni-free Co-Cr-Mo alloys: Role of strain-induced ε martensite and its intersecting phenomena (2016)
  • Author(s): Manami Mori, Kenta Yamanaka, Akihiko Chiba
  • Journal Title: Journal of the Mechanical Behavior of Biomedical Materials Volume: 55 Pages: 201-214
  • DOI: 10.1016/j.jmbbm.2015.10.021
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Developing high strength and ductility in biomedical Co-Cr cast alloys by simultaneous doping with nitrogen and carbon (2016)
  • Author(s): Kenta Yamanaka, Manami Mori, Akihiko Chiba
  • Journal Title: Acta Biomaterialia Volume: 31 Pages: 435-447
  • DOI: 10.1016/j.actbio.2015.12.011
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Preventing high-temperature oxidation of Co-Cr-based dental alloys by boron doping (2016)
  • Author(s): Kenta Yamanaka, Manami Mori, Kazuyo Ohmura, Akihiko Chiba
  • Journal Title: Journal of Materials Chemistry B Volume: 4 Issue: 2 Pages: 309-317
  • DOI: 10.1039/c5tb01944c
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Characterisation of nanoscale carbide precipitation in as-cast Co-Cr-W-based dental alloys (2016)
  • Author(s): Kenta Yamanaka, Manami Mori, Kazuhisa Sato, Akihiko Chiba
  • Journal Title: Journal of Materials Chemistry B Volume: 4 Issue: 10 Pages: 1778-1786
  • DOI: 10.1039/c6tb00040a
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Manufacturing of high-strength Ni-free Co-Cr-Mo alloy rods via cold swaging (2016)
  • Author(s): Kenta Yamanaka, Manami Mori, Kazuo Yoshida, Koji Kuramoto, Akihiko Chiba
  • Journal Title: Journal of the Mechanical Behavior of Biomedical Materials Volume: 60 Pages: 38-47
  • DOI: 10.1016/j.jmbbm.2015.12.032
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Strengthening of biomedical Ni-free Co-Cr-Mo alloy by multipass “low-strain-per-pass” thermomechanical processing (2015)
  • Author(s): Manami Mori, Kenta Yamanaka, Shigeo Sato, Shinki Tsubaki, Kozue Satoh, Masayoshi Kumagai, Muneyuki Imafuku, Takahisa Shobu, Akihiko Chiba
  • Journal Title: Acta Biomaterialia Volume: 28 Pages: 215-224
  • DOI: 10.1016/j.actbio.2015.09.016
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Analysis of the Fracture Mechanism of Ti-6Al-4V Alloy Rods that failed Clinically after Spinal Instrumentation Surgery (2015)
  • Author(s): Kenta Yamanaka, Manami Mori, Ken Yamazaki, Ruriko Kumagai, Minoru Doita, Akihiko Chiba
  • Journal Title: Spine Volume: 40 Issue: 13 Pages: E767-E773
  • DOI: 10.1097/brs.0000000000000881
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Effect of carbon on the microstructure, mechanical properties and metal ion release of Ni-free Co-Cr-Mo alloys containing nitrogen (2015)
  • Author(s): Manami Mori, Kenta Yamanaka, Koji Kuramoto, Kazuyo Ohmura, Tetsuya Ashino, Akihiko Chiba
  • Journal Title: Materials Science and Engineering: C Volume: 55 Pages: 145-154
  • DOI: 10.1016/j.msec.2015.05.058
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Surface characterisation of Ni-free Co-Cr-W-based dental alloys exposed to high temperatures and the effects of adding silicon (2015)
  • Author(s): Kenta Yamanaka, Manami Mori, Akihiko Chiba
  • Journal Title: Corrosion Science Volume: 94 Pages: 411-419
  • DOI: 10.1016/j.corsci.2015.02.030
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Assessment of precipitation behavior in dental castings of a Co-Cr-Mo alloy (2015)
  • Author(s): Kenta Yamanaka, Manami Mori, Akihiko Chiba
  • Journal Title: Journal of the Mechanical Behavior of Biomedical Materials Volume: 50 Pages: 268-276
  • DOI: 10.1016/j.jmbbm.2015.06.020
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Texture evolution and mechanical anisotropy of biomedical hot-rolled Co-Cr-Mo alloy (2015)
  • Author(s): Manami Mori, Kenta Yamanaka, Shigeo Sato, Akihiko Chiba
  • Journal Title: Journal of the Mechanical Behavior of Biomedical Materials Volume: 51 Pages: 205-214
  • DOI: 10.1016/j.jmbbm.2015.06.034
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Effects of Carbon Addition on Mechanical Properties and Microstructures of Ni-Free Co-Cr-W-Based Dental Alloys (2015)
  • Author(s): Kenta Yamanaka, Manami Mori, Akihiko Chiba
  • Journal Title: Interface Oral Health Science 2014 Volume: 1 Pages: 225-236
  • DOI: 10.1007/978-4-431-55192-8_19
  • ISBN: 9784431551256, 9784431551928
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Co合金における加工に伴うマルテンサイト相発達と転位増殖の強度への影響 (2017)
  • Author(s): 中川 真惟子, 小貫 祐介, 山中 謙太, 森 真奈美, 千葉 晶彦, 佐藤 成男
  • Organizer: 日本金属学会2017年春期(第160回)講演大会
  • Place of Presentation: 八王子市
  • Year and Date: 2017-03-15
• [Presentation] A Novel Strengthening Strategy Using Stacking Faults for Biomedical Co-Cr-Mo Alloys (2017)
  • Author(s): Kenta Yamanaka, Manami Mori, Shigeo Sato, Akihiko Chiba
  • Organizer: TMS 2017 Annual Meeting & Exhibition
  • Place of Presentation: San Diego, California, USA
  • Year and Date: 2017-02-26
  • Int'l Joint Research
• [Presentation] X線回折ラインプロファイル解析を用いた生体用Co-Cr-Mo合金の高強度化メカニズムとひずみ誘起マルテンサイト変態挙動の評価 (2017)
  • Author(s): 山中 謙太, 森 真奈美, 佐藤 成男, 千葉 晶彦
  • Organizer: 日本鉄鋼協会第173回春期講演大会シンポジウム「中性子・X線回折、散乱法による金属ミクロ組織解析の課題と展望」
  • Place of Presentation: 八王子市
  • Invited
• [Presentation] マルテンサイト変態と転位による強化機構の同時解析を指向した中性子回折法の確立 (2017)
  • Author(s): 佐藤 成男, 中川 真惟子, 小貫 祐介, 山中 謙太, 森 真奈美, 千葉 晶彦
  • Organizer: 日本鉄鋼協会第173回春期講演大会シンポジウム「中性子・X線回折、散乱法による金属ミクロ組織解析の課題と展望」
  • Place of Presentation: 八王子市
  • Invited
• [Presentation] 高密度格子欠陥組織を有する生体用Co-Cr-Mo合金の引張変形におけるひずみ誘起マルテンサイト変態挙動 (2016)
  • Author(s): 森 真奈美, 山中 謙太, 佐藤 成男, 椿 真貴, 佐藤 こずえ, 熊谷 正芳, 今福 宗行, 菖蒲 敬久, 千葉 晶彦
  • Organizer: 日本金属学会2016年秋期（第159回）講演大会
  • Place of Presentation: 大阪市
  • Year and Date: 2016-09-21
• [Presentation] 冷間スウェージ加工後の生体用Co-Cr-Mo合金の焼鈍熱処理における組織と機械的特性の変化 (2016)
  • Author(s): 佐藤 奈々絵, 森 真奈美, 山中 謙太, 吉田 和男, 倉本 浩二, 千葉 晶彦
  • Organizer: 日本金属学会2016年秋期（第159回）講演大会
  • Place of Presentation: 大阪市
  • Year and Date: 2016-09-21
• [Presentation] 加工プロセスを駆使した生体用Co-Cr合金の組織制御と高機能化 (2016)
  • Author(s): 山中 謙太
  • Organizer: 日本金属学会2016年秋期（第159回）講演大会
  • Place of Presentation: 大阪市
  • Year and Date: 2016-09-21
  • Invited
• [Presentation] Processing, Microstructure and Mechanical Properties of Co-Cr-Mo Alloy Rods for Spinal Instrumentation Surgery (2016)
  • Author(s): K. Yamanaka, M. Mori, K. Yoshida, K. Kuramoto, A. Chiba
  • Organizer: PRICM9: 9th Pacific Rim International Conference on Advanced Materials and Processing
  • Place of Presentation: 京都市
  • Year and Date: 2016-08-01
  • Int'l Joint Research
• [Presentation] 熱間加工による高強度Co-Cr-Mo合金ロッド材の試作と組織・力学特性の評価 (2016)
  • Author(s): 山中 謙太, 森 真奈美, 吉田 和男, 倉本 浩二, 千葉 晶彦
  • Organizer: 日本金属学会2016年春期(第158回)講演大会
  • Place of Presentation: 東京
  • Year and Date: 2016-03-23
• [Presentation] 生体用Co-Cr系鋳造合金のC, N同時添加による高機能化 (2016)
  • Author(s): 山中 謙太, 森 真奈美, 千葉 晶彦
  • Organizer: 日本バイオマテリアル学会東北地域講演会「バイオマテリアル研究若手交流会」
  • Place of Presentation: 仙台市
  • Invited
• [Presentation] Development of High-strength Co-Cr-Mo Alloy Rods for Spinal Instrumentation Surgery (2015)
  • Author(s): Kenta Yamanaka, Manami Mori, Kazuo Yoshida, Koji Kuramoto, Akihiko Chiba, Ken Yamazaki
  • Organizer: Materials Science & Technology 2015
  • Place of Presentation: ColuColumbus, Ohio, USA,
  • Year and Date: 2015-10-04
  • Int'l Joint Research
• [Presentation] Assessment of Microstructures and Mechanical Behavior of Hot-rolled Co-Cr-Mo Alloys (2015)
  • Author(s): Manami Mori, Kenta Yamanaka, Shigeo Sato, Akihiko Chiba
  • Organizer: Materials Science & Technology 2015
  • Place of Presentation: Columbus, Ohio, USA,
  • Year and Date: 2015-10-04
  • Int'l Joint Research
• [Presentation] Application of Laser Ultrasonics for the Real Time Measurement of Grain Size in Cobalt Based Super Alloys (2015)
  • Author(s): Mahsa Keyvani, Thomas Garcin, Damien Fabregue, Matthias Militzer, Kenta Yamanaka, Akihiko Chiba
  • Organizer: Materials Science & Technology 2015
  • Place of Presentation: Columbus, Ohio, USA,
  • Year and Date: 2015-10-04
  • Int'l Joint Research
• [Presentation] 生体用Co-Cr-Mo-N合金の組織、力学特性およびイオン溶出挙動に及ぼすC添加の影響 (2015)
  • Author(s): 山中 謙太, 森 真奈美, 倉本 浩二, 大村 和世, 千葉 晶彦
  • Organizer: 日本金属学会2015年秋期(第157回)講演大会
  • Place of Presentation: 福岡市
  • Year and Date: 2015-09-16
• [Presentation] X線ラインプロファイル解析による生体用Co-Cr-Mo合金の熱間圧延組織の評価と力学特性との関係 (2015)
  • Author(s): 森 真奈美, 山中 謙太, 佐藤 成男, 千葉 晶彦
  • Organizer: 日本金属学会2015年秋期(第157回)講演大会
  • Place of Presentation: 福岡市
  • Year and Date: 2015-09-16
• [Presentation] 人工股関節シミュレーターによるメタルオンメタルタイプCo-Cr-Mo合金製人工股関節の摩耗挙動に及ぼす炭素添加の影響 (2015)
  • Author(s): 千葉 晶彦, 陳 研, 小泉 雄一郎, 山中 謙太, 李 云平, ハニ ハイダー
  • Organizer: 日本金属学会2015年秋期(第157回)講演大会
  • Place of Presentation: 福岡市
  • Year and Date: 2015-09-16
• [Presentation] Effects of carbon addition on mechanical and corrosion properties of biomedical Co-Cr-W cast alloys containing high amounts of chromium and nitrogen (2015)
  • Author(s): Kenta Yamanaka, Manami Mori, Koji Kuramoto, Akihiko Chiba
  • Organizer: The 10th Anniversary International Workshop on Biomaterials in Interface Science in conjunction with Innovative Research for Biosis-Abiosis Intelligent Interface Summer Seminar 2015
  • Place of Presentation: Zao, Miyagi, Japan
  • Year and Date: 2015-08-03
  • Int'l Joint Research
• [Presentation] 生体用Co-Cr-Mo合金の冷間圧延における組織発達過程と加工硬化挙動 (2015)
  • Author(s): 山中 謙太, 森 真奈美, 千葉 晶彦
  • Organizer: 日本塑性加工学会平成27年度塑性加工春季講演会
  • Place of Presentation: 横浜市
  • Year and Date: 2015-05-30
• [Presentation] 生体用Co-Cr-Mo合金の熱間圧延における組織・力学特性の変化と強化メカニズムの検討 (2015)
  • Author(s): 森 真奈美, 山中 謙太, 佐藤 成男, 熊谷 正芳, 今福 宗行, 千葉 晶彦
  • Organizer: 日本塑性加工学会平成27年度塑性加工春季講演会
  • Place of Presentation: 横浜市
  • Year and Date: 2015-05-30
• [Presentation] 高Cr高N含有Co-Cr-W合金の力学特性に及ぼすC添加の影響 (2015)
  • Author(s): 山中 謙太, 森 真奈美, 倉本 浩二, 千葉 晶彦
  • Organizer: 日本歯科理工学会春期学術講演会
  • Place of Presentation: 仙台市
  • Year and Date: 2015-04-12
• [Presentation] Evolution of cold-rolled microstructure and mechanical properties of biomedical Co-Cr alloys (2015)
  • Author(s): Manami Mori, Kenta Yamanaka, Akihiko Chiba
  • Organizer: TMS 2015 144th Annual Meeting & Exhibition
  • Place of Presentation: Orlando (USA)
  • Year and Date: 2015-03-15 – 2015-03-19
• [Presentation] Nanostructured Co-Cr alloys for biomedical applications (2014)
  • Author(s): Kenta Yamanaka, Manami Mori, Akihiko Chiba
  • Organizer: Materials Science and Technology 2014
  • Place of Presentation: Pittsburgh (USA)
  • Year and Date: 2014-10-12 – 2014-10-16
• [Presentation] Strengthening mechanism of biomedical Co-Cr-Mo alloy prepared by thermomechanical processing (2014)
  • Author(s): Manami Mori, Kenta Yamanaka, Akihiko Chiba
  • Organizer: Materials Science and Technology 2014
  • Place of Presentation: Pittsburgh (USA)
  • Year and Date: 2014-10-12 – 2014-10-16
• [Presentation] 脊椎固定用Ti-6Al-4V合金ロッドの折損原因の検討と高強度Co-Cr合金ロッドの開発 (2014)
  • Author(s): 山中 謙太, 森 真奈美, 吉田 和男, 千葉 晶彦, 倉本 浩二, 山崎 健, 熊谷 瑠里子, 土井田 稔
  • Organizer: 日本金属学会
  • Place of Presentation: 名古屋大学（名古屋市）
  • Year and Date: 2014-09-24 – 2014-09-26
• [Remarks] 東北大学研究者一覧
  • URL: http://db.tohoku.ac.jp/whois/detail/82483b36a80cd6391159320edc4f20bb.html
• [Remarks] 東北大学金属材料研究所千葉研究室ウェブページ
  • URL: http://www.chibalab.imr.tohoku.ac.jp
• [Remarks] 所属研究室webページ
  • URL: http://www.chibalab.imr.tohoku.ac.jp