Dynamic recovery and superelasticity of columnar-grained Cu–Al–Mn shape memory alloy

Sheng Xu, Haiyou Huang, Jianxin Xie, Yuta Kimura, Xiao Xu, Toshihiro Omori, Ryosuke Kainuma

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

The columnar‐grained Cu71.5Al17.5Mn11 shape memory alloy was treated by single‐pass hot rolling at 900 °C with a thickness reduction of 67.3% followed by immediate water quenching. Dynamic recovery other than discontinuous dynamic recrystallization occurred during the treatment process, bringing about retained columnar grains with <001> textures, as well as dislocations introduced into the parent matrix. As a result, a large maximum recoverable strain of more than 11% was maintained due to the retained beneficial grain characteristics. The critical stress for inducing martensitic transformation and stress hysteresis were enhanced mainly due to the existence of dislocations.

Original languageEnglish
Article number141
JournalMetals
Volume7
Issue number4
DOIs
Publication statusPublished - 2017 Apr 15

Keywords

  • Columnar grain
  • Cu–Al–Mn
  • Dynamic recovery
  • Hot deformation
  • Martensitic transformation
  • Shape memory alloy
  • Superelasticity

ASJC Scopus subject areas

  • Materials Science(all)

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