Phase constitution and martensitic transformation behavior of Au-51Ti-18Co biomedical shape memory alloy heat-treated at 1173K to 1373K

Taywin Buasri, Hyunbo Shim, Masaki Tahara, Tomonari Inamura, Kenji Goto, Hiroyasu Kanetaka, Yoko Yamabe-Mitarai, Hideki Hosoda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Phase constitution and martensitic transformation behavior were investigated for a Au–51Ti–18Co alloy heat-treated at 1173 K to 1373 K for 3.6 ks. The Au–51Ti–18Co alloy was fabricated by Ar arc-melting technique and subsequently by hot-forging at 1423 K for 10.8 ks. X-ray diffraction analysis revealed that B2 parent phase, B19 martensite phase and AuTi3 simultaneously appeared regardless of the heat-treatment temperatures. By increasing the heat-treatment temperature, the volume fraction of AuTi3 was slightly reduced. Besides, the lattice transformation strain which was calculated from the precisely-determined lattice parameters was evaluated to be 7% in the Au–51Ti–18Co alloy in all the heat-treated conditions. This value is comparable to that of NiTi practical alloys. From differential scanning calorimetry (DSC) analysis, reverse martensitic transformation temperature was slightly increased with the heat-treatment temperature. From the lattice transformation strain point of views, the Au–51Ti–18Co has a large potential for novel biomedical shape memory alloy.

Original languageEnglish
Title of host publicationTHERMEC 2016
EditorsChristof Sommitsch, Mihail Ionescu, Brajendra Mishra, Brajendra Mishra, Ernst Kozeschnik, T. Chandra
PublisherTrans Tech Publications Ltd
Pages256-261
Number of pages6
ISBN (Print)9783035711295
DOIs
Publication statusPublished - 2017 Jan 1
Event9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016 - Graz, Austria
Duration: 2016 May 292016 Jun 3

Publication series

NameMaterials Science Forum
Volume879
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016
CountryAustria
CityGraz
Period16/5/2916/6/3

Keywords

  • AuTiCo
  • Biomedical shape memory alloy
  • Heat-treatment
  • Lattice transformation strain
  • Martensitic transformation

ASJC Scopus subject areas

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

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  • Cite this

    Buasri, T., Shim, H., Tahara, M., Inamura, T., Goto, K., Kanetaka, H., Yamabe-Mitarai, Y., & Hosoda, H. (2017). Phase constitution and martensitic transformation behavior of Au-51Ti-18Co biomedical shape memory alloy heat-treated at 1173K to 1373K. In C. Sommitsch, M. Ionescu, B. Mishra, B. Mishra, E. Kozeschnik, & T. Chandra (Eds.), THERMEC 2016 (pp. 256-261). (Materials Science Forum; Vol. 879). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.879.256