Experimental consideration of multistage martensitic transformation and precipitation behavior in aged Ni-rich Ti-Ni shape memory alloys

Minoru Nishida, Toru Hara, Takuya Ohba, Koichi Yamaguchi, Koichi Tanaka, Kiyoshi Yamauchi

研究成果: Contribution to journalArticle査読

66 被引用数 (Scopus)

抄録

It has been demonstrated with systematic experiments that the appearance and disappearance of multistage martensitic transformation in aged Ni-rich Ti-Ni alloys depend on the heat treatment atmosphere. 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 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 an extrinsic nature, i.e., a kind of artifact during the heat treatment.

本文言語英語
ページ(範囲)2631-2636
ページ数6
ジャーナルMaterials Transactions
44
12
DOI
出版ステータス出版済み - 12 2003
外部発表はい

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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