Martensitic transformation and mechanical properties of AuCuAl-based biomedical shape memory alloys containing various quaternary elements

Akira Umise, Tomohiko Morita, Takahumi Hori, Kenji Goto, Hiroyasu Kanetaka, Masaki Tahara, Tomonari Inamura, Hideki Hosoda

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Although AuCuAl shape memory alloys are hopeful as advanced functional biomaterials exhibiting shape memory effect and good X-ray radiography, the limited ductility in polycrystalline materials is a drawback for practical applications. In this study, effects of quaternary elements (B, Ti, Zr, Cr, Mn, Fe, Zn, In and Sn) on martensitic transformation start temperature (Ms) and mechanical properties are investigated. It was found that (1) Mn, Fe, In and Sn additions decrease Ms and that (2) B, Ti, Zr, Cr and Zr additions do not affect or slightly increase Ms. Among the quaternary additions investigated, only Fe addition drastically improves ductility. Therefore, Fe is concluded to be the effective additional element to bring both sufficiently low Ms and ductility to AuCuAl alloys.

Original languageEnglish
Pages (from-to)71-76
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume80
Issue number1
DOIs
Publication statusPublished - 2016

Keywords

  • Ductility
  • Gold-copper-aluminum
  • Martensitic transformation
  • Mechanical properties
  • Quaternary addition
  • Shape memory alloy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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