Effect of heat treatment conditions on multistage martensitic transformation in aged Ni-rich Ti-Ni alloys

Minoru Nishida, Toru Hara, Yasuhiro Morizono, Mitsuhiro Matsuda, Kousuke Fujishima

研究成果: ジャーナルへの寄稿会議記事査読

抄録

It has been demonstrated with systematic experiments that the appearance and disappearance of multistage martensitic transformation (MMT) in aged Ni-rich Ti-Ni alloys depend on the heat treatment conditions. No multistage transformation occurs when the evaporation of Ti and Ni and/or the preferential oxidation of Ti in the specimen are prevented and the purification of heat treatment atmosphere in an evacuated quartz tube is achieved. The heterogeneity in precipitation morphology of the Ti3Ni4 phase, which is responsible for the multistage transformation can be suppressed with the regulation of heat treatment atmosphere as mentioned above. We have concluded that the multistage martensitic transformation in aged Ni-rich Ti-Ni alloys is extrinsic in nature, and is an artifact during the heat treatment.

本文言語英語
論文番号S5.1
ページ(範囲)365-370
ページ数6
ジャーナルMaterials Research Society Symposium Proceedings
842
出版ステータス出版済み - 2005
外部発表はい
イベント2004 MRS Fall Meeting - Boston, MA, 米国
継続期間: 11月 29 200412月 1 2004

!!!All Science Journal Classification (ASJC) codes

  • 材料科学一般
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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