Development of new shape memory alloys-Alloy design and process-

2010 Fiscal Year Final Research Report

• Project/Area Number: 20360342
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Metal making engineering
• Research Institution: Tohoku University
• Principal Investigator: OIKAWA Katsunari 東北大学, 大学院・工学研究科, 准教授 (70356608)
• Co-Investigator(Kenkyū-buntansha): ISHIDA Kiyohito 東北大学, 大学院・工学研究科, 教育研究支援者 (20151368)
• Co-Investigator(Renkei-kenkyūsha): NANJYO Hiroshi 産業技術総合研究所, コンパクト化学プ, ロセス研究センターチーム長 (90357690)
• Project Period (FY): 2008 – 2010
• Keywords: 形状記憶合金 / 結晶成長 / 強磁性 / 高温

Research Abstract

Ni-Fe-Ga alloys and Ni-Fe-Ga-Co alloys have been received great attention as ferromagnetic shape memory alloys and high temperature alloys. In this study, the fiber shape single crystals of these alloys were prepared by the micro-pulling-down method. Optimum conditions for the crystal growth and the solidification behavior and physical properties of them were investigated. As the results, the single crystal wires approximately 1-3 mm in diameter and 200 mm in length could be grown by 10 mm/min. pulling-down-rate. The effective distribution coefficient of them approximately unit, suggesting that the macroscopic segregation are very small. The stresstemperature phase diagram shows that the martensitic phase transformation behavior showed the Clausius-Clapeyron relation.

Research Products

• [Journal Article] Phase transformations in the B2 phase of Co-rich binary alloys (2011)
  • Author(s): K. Niitsu, T. Omori, M. Nagasako, K. Oikawa, R. Kainuma and K. Ishida
  • Journal Title: J. Alloy Comp. Volume: 509 Pages: 2697-2702
  • Peer Reviewed
• [Journal Article] Large magnetic-field-induced strain in Co-Ni-Al single-variant ferromagnetic shape memory alloy (2010)
  • Author(s): H. Morito, K. Oikawa, A. Fujita, K. Fukamichi, R. Kainuma and K. Ishida
  • Journal Title: Scri. Mater. Volume: 63 Pages: 379-382
  • Peer Reviewed
• [Journal Article] Elastic and superelastic properties of NiFeCoGa fiber grown by micro-pulling down method (2009)
  • Author(s): K. Oikawa, R. Saito, K. Anzai, H. Ishikawa, Y. Sutou, T. Omori, A. Yoshikawa, V. A. Chernenko, S. Besseghini, A. Gambardella, R. Kainuma and K. Ishida
  • Journal Title: Mater. Trans Volume: 50 Pages: 934-937
  • Peer Reviewed
• [Journal Article] Properties of Co-alloyed Ni-Fe-Ga Ferromagnetic shape memory alloys (2009)
  • Author(s): V. A. Chernenko, K. Oikawa, M. Chmielus, S. Besseghini, E. Villa, F. Albertini, L. Righi, A. Paoluzi, P. Mullner, R. Kainuma and K. Ishida
  • Journal Title: J. Mater. Eng. Perfor. Volume: 18 Pages: 548-553
  • Peer Reviewed
• [Journal Article] Macroscopic pattern formation preceding martensitic transformation in an ferromagnetic shape memory alloy Ni51Fe22Ga27 (2008)
  • Author(s): Y. Murakami, D. Shindo, R. Kainuma, K. Oikawa, K. Ishida
  • Journal Title: Appl. Phys. Lett Volume: 92 Pages: 102512
  • Peer Reviewed
• [Journal Article] Martensitic transformation in Ni-Fe-Ga alloys (2008)
  • Author(s): J. M. Barandiaran, J. Gutierre, P. Lazpita, V. A. Charnenko, C. Segui, J. Pons, E. Cesaric, K. Oikawa and T. Kanomata
  • Journal Title: Mater. Sci. Eng. Volume: 478 Pages: 125-129
  • Peer Reviewed
• [Presentation] 磁性形状記憶合金の開発とマイクロPD法による結晶育成 (2010)
  • Author(s): 及川勝成, 須藤祐司, 石川博康, 貝沼亮介, 石田清仁
  • Organizer: 日本鉄鋼協会
  • Place of Presentation: つくば市
  • Year and Date: 2010-03-29
• [Presentation] Segeregation behaviors and superelastic properties of NiFeCoGa single crystals grown by micro-pulling-down method (2009)
  • Author(s): K. Oikawa, R. Saito, K. Anzai, H. Ishikawa, Y. Sutou, R. Kainuma, and K. Ishida
  • Organizer: THERMEC 2009
  • Place of Presentation: Berlin, Germany
  • Year and Date: 2009-08-28
• [Presentation] 熱力学データベースの構築と計算状態図の材料設計への応用 (2009)
  • Author(s): 及川勝成
  • Organizer: 日本金属学会
  • Place of Presentation: 東京
  • Year and Date: 2009-03-29