Development of Martensitic Alloys with High Interface Mobility

• Project/Area Number: 17H03405
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: Tohoku University
• Principal Investigator: Omori Toshihiro 東北大学, 工学研究科, 准教授 (60451530)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000); Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2018: ¥9,880,000 (Direct Cost: ¥7,600,000、Indirect Cost: ¥2,280,000); Fiscal Year 2017: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
• Keywords: マルテンサイト変態 / 形状記憶合金 / 超弾性 / 制振合金 / 易動度 / 界面 / 超弾性合金

Outline of Final Research Achievements

In this study, the effects of the alloy composition on the crystal structure, lattice coherency and mobility of the parent and martensite phases were investigated in single phase Cu-Al-Mn and Fe-Mn-Al-Ni with nano-precipitates. The mobile interface and transformation manner (thermoelastic, non-thermoelastic) were discussed. Furthermore, fatigue resistant and high damping materials were developed.

Academic Significance and Societal Importance of the Research Achievements

Cu-Al-Mn合金では、集合組織の制御により結晶粒間の拘束力を低減させることで、減衰特性が大幅に向上した。このときの減衰能は、Ti-NiやM2052よりも高い優れた特性である。強度を上昇させるため、第二相をピン止め粒子として用いることで結晶粒の微細化を図った。集合組織制御と結晶粒微細化の組み合わせにより、減衰能を大きく低下させることなく強度を上昇させることができた。Fe-Mn-Al-Ni合金では、高温領域まで比較的高い減衰能を示すことが明らかになった。また、Cu-Al-Mn合金の繰り返し疲労の改善を試み、Al濃度の上昇により、特に低サイクル数における残留歪が減少した。

Research Products

• [Journal Article] Orientation Dependence of Superelasticity and Stress Hysteresis in Cu–Al–Mn Alloy (2020)
  • Author(s): Omori Toshihiro、Kawata Shingo、Kainuma Ryosuke
  • Journal Title: MATERIALS TRANSACTIONS Volume: 61 Issue: 1 Pages: 55-60
  • DOI: 10.2320/matertrans.MT-MJ2019008
  • NAID: 130007772503
  • ISSN: 1345-9678, 1347-5320
  • Year and Date: 2020-01-01
  • Peer Reviewed
• [Journal Article] Abnormal Grain Growth Induced by Cyclic Heat Treatment and Fabrication of Cu-Based Shape Memory Alloy Single Crystal (2019)
  • Author(s): 大森俊洋、草間知枝、喜瀬純男、田中豊延、荒木慶一、貝沼亮介
  • Journal Title: Materia Japan Volume: 58 Issue: 3 Pages: 137-143
  • DOI: 10.2320/materia.58.137
  • NAID: 130007606006
  • ISSN: 1340-2625, 1884-5843
  • Year and Date: 2019-03-01
• [Journal Article] Cyclic Properties of Superelasticity in Cu?Al?Mn Single-Crystalline Sheets with Bainite Precipitates (2018)
  • Author(s): Kainuma Ryosuke、Yoshinaka Yohei、Omori Toshihiro
  • Journal Title: Shape Memory and Superelasticity Volume: 4 Issue: 4 Pages: 428-434
  • DOI: 10.1007/s40830-018-0188-6
  • Peer Reviewed
• [Journal Article] Fe-Mn-Al-Ni超弾性合金のミクロ組織制御 (2018)
  • Author(s): 大森俊洋、貝沼亮介
  • Journal Title: 金属 Volume: 88 Pages: 621-628
• [Journal Article] Ultra-large single crystals by abnormal grain growth (2017)
  • Author(s): Kusama Tomoe、Omori Toshihiro、Saito Takashi、Kise Sumio、Tanaka Toyonobu、Araki Yoshikazu、Kainuma Ryosuke
  • Journal Title: Nature Communications Volume: 8 Issue: 1 Pages: 1-9
  • DOI: 10.1038/s41467-017-00383-0
  • NAID: 120006338047
  • Peer Reviewed / Open Access
• [Journal Article] Stress- and Magnetic Field-Induced Martensitic Transformation at Cryogenic Temperatures in Fe?Mn?Al?Ni Shape Memory Alloys (2017)
  • Author(s): Xia Ji、Xu Xiao、Miyake Atsushi、Kimura Yuta、Omori Toshihiro、Tokunaga Masashi、Kainuma Ryosuke
  • Journal Title: Shape Memory and Superelasticity Volume: 3 Issue: 4 Pages: 467-475
  • DOI: 10.1007/s40830-017-0132-1
  • Peer Reviewed
• [Journal Article] Martensitic Transformation and Superelasticity in Fe?Mn?Al-Based Shape Memory Alloys (2017)
  • Author(s): Omori Toshihiro、Kainuma Ryosuke
  • Journal Title: Shape Memory and Superelasticity Volume: 3 Issue: 4 Pages: 322-334
  • DOI: 10.1007/s40830-017-0129-9
  • Peer Reviewed
• [Presentation] Fe-Mn-Al基合金におけるマルテンサイト変態の熱力学解析 (2020)
  • Author(s): 大森俊洋
  • Organizer: 日本鉄鋼協会第179回春季講演大会
• [Presentation] Abonrmal grain growth induced by phase transformation (2020)
  • Author(s): Toshihiro Omori, Ryosuke Kainuma
  • Organizer: 日本金属学会2020年春期講演大会
  • Invited
• [Presentation] Large Single Crystals by Abnormal Grain Growth and Superelasticity in Cu- and Fe-Based Alloys (2018)
  • Author(s): T. Omori, T. Kusama, S. Kise, Y. Araki, R. Kainuma
  • Organizer: ESOMAT 2018
  • Int'l Joint Research
• [Presentation] Temperature dependence of critical stress and entropy change for maritensitic transformation in Fe-Mn-Al-Ni shape memory alloy (2018)
  • Author(s): J. Xia, X. Xu, T. Omori, R. Kainuma
  • Organizer: ESOMAT 2018
  • Int'l Joint Research
• [Presentation] Ni添加Cu-Al-Mn合金の超弾性サイクル特性 (2018)
  • Author(s): 松本暢康, 許皛, 大森俊洋, 貝沼亮介
  • Organizer: 日本金属学会2018年(第163回)秋期講演大会
• [Presentation] Fe-Mn-Al-Ni系形状記憶合金における超弾性効果の温度依存性とエントロピー変化 (2018)
  • Author(s): 夏季, 許皛, 大森俊洋, 貝沼亮介
  • Organizer: 日本金属学会2018年(第163回)秋期講演大会
• [Presentation] サイクル熱処理誘起異常粒成長によるCu-Al-Mn大型部材の単結晶化と超弾性 (2018)
  • Author(s): 大森俊洋，草間知枝，喜瀬純男，田中豊延，荒木慶一，貝沼亮介
  • Organizer: 日本金属学会2018年春期講演大会
• [Presentation] Role of nano-precipitates in thermoelastic martensitic transformation in Fe-Mn-Al-Ni shape memory alloys (2017)
  • Author(s): T. Omori, M. Nagasako, R. Kainuma
  • Organizer: DPG Spring Meeting
  • Int'l Joint Research
• [Presentation] Cr添加Fe-Mn-Al-Ni超弾性合金におけるサイクル熱処理による異常粒成長 (2017)
  • Author(s): 野口侑紀, 大森俊洋, 貝沼亮介
  • Organizer: 日本金属学会2017年(第161回)秋期講演大会
• [Presentation] Cu-Al-Mn合金の超弾性サイクル特性 (2017)
  • Author(s): 松本暢康, 許皛, 大森俊洋, 貝沼亮介
  • Organizer: 日本金属学会2017年(第161回)秋期講演大会
• [Presentation] Effect of Cr on martensitic transformationand oxidation resistance in Fe-Mn-Al-Ni alloys (2017)
  • Author(s): Y. Noguchi, T. Omori, R. Kainuma
  • Organizer: ICOMAT 2017
  • Int'l Joint Research