Martensitic transformation and shape memory effects in Co-V-Al alloys at high temperatures

Hengxing Jiang, Shuiyuan Yang, Cuiping Wang, Yanqing Zhang, Xiao Xu, Yuechao Chen, Toshihiro Omori, Ryosuke Kainuma, Xingjun Liu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Martensitic transformation in Co-V-Al ternary systems was investigated by means of the structural and thermal analysis in single phase martensite alloys. The martensite phase presents a non-modulated L10 structure transformed from a B2 parent phase. With the increase of V content, martensitic transformation temperatures exceeding 100 °C and occurring at approximately 200–300 °C. A two-step shape memory effect occurring at different temperature ranges was found for the first time in Co60V30Al10 alloys, and considerable recoverable strains reaching up to 3.0% were observed. This study shows that Co-V-Al alloys have potential as new candidates for high-temperature shape memory alloys operating in a large temperature range.

Original languageEnglish
Pages (from-to)648-654
Number of pages7
JournalJournal of Alloys and Compounds
Volume786
DOIs
Publication statusPublished - 2019 May 25

Keywords

  • High-temperature shape memory alloys (HTSMA)
  • Martensite stabilization
  • Martensitic transformation
  • Thermal analysis

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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