Martensitic transformation and related properties of AuTi-FeTi pseudobinary alloys

Taku Aoki, Masaki Tahara, Kenji Goto, Yoko Mitarai, Hiroyasu Kanetaka, Tomonari Inamura, Hideki Hosoda

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

5 Citations (Scopus)

Abstract

The effects of Fe addition on martensitic transformation and mechanical properties of AuTi were investigated in this study. It was found that B2 parent phase is stabilized by the Fe addition and that AuTi can contain at least 20mol%Fe. The lattice deformation strain evaluated from θ-2θ X-ray diffraction analysis (XRD) is not significantly changed by the Fe addition. The decrease in Ms evaluated by differential scanning calorimetry (DSC) is -40K/mol%Fe. Tensile tests revealed that, with increasing Fe content, the yield stress decreases up to about 13mol%Fe, largely increases up to 15mol%Fe and then decreases gradually. By taking into account XRD and DSC results, these behaviors are judged to correspond to reorientation of martensite variants, stress induced martensitic transformation and slip deformation of parent phase, respectively. The values of dσSIMT/dCFe and dσSIMT/dT are evaluated to be -170MPa/mol%Fe and -4.3MPa/K, respectively. The elongation is degraded with increasing Fe content from 8% in AuTi (0mol%Fe, martensite phase) to 2% in AuTi- 20mol%Fe (parent phase) depending on the apparent phase.

Original languageEnglish
Title of host publicationTHERMEC 2013 Supplement
PublisherTrans Tech Publications Ltd
Pages25-30
Number of pages6
ISBN (Print)9783038350743
DOIs
Publication statusPublished - 2014
Event8th International Conference on Processing and Manufacturing of Advanced Materials: Processing, Fabrication, Properties, Applications, THERMEC 2013 - Las Vegas, NV, United States
Duration: 2013 Dec 22013 Dec 6

Publication series

NameAdvanced Materials Research
Volume922
ISSN (Print)1022-6680

Other

Other8th International Conference on Processing and Manufacturing of Advanced Materials: Processing, Fabrication, Properties, Applications, THERMEC 2013
CountryUnited States
CityLas Vegas, NV
Period13/12/213/12/6

Keywords

  • AuTi
  • FeTi
  • Martensitic transformation
  • Pseudobinary system

ASJC Scopus subject areas

  • Engineering(all)

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