Effect of Ta content on martensitic transformation behavior of RuTa ultrahigh temperature shape memory alloys

Zhi Rong He, Jing En Zhou, Y. Furuya

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Effects of Ta content on martensitic transformation (MT) behavior of Ru100-x Tax (x = 46-54 at.%) alloys have been investigated by differential scanning calorimetry, dilatometry, X-ray diffraction and optical microscopy. Ta content significantly affects the MT behavior of RuTa alloys. The one-stage reservible MT occurs in Ta-poor RuTa alloys with Ta content less than 49 at.%. The two-stage reservible MT takes place in near-equiatomic RuTa alloys. No reservible MT is observed in Ta-rich alloys with Ta content more then 52 at.% Ta. The MT temperatures and hysteresis of RuTa alloys decrease with increasing Ta content. The aged and thermal cycled processes are nearly no effect on the MT behavior of these alloys. The deforming way of RuTa alloys is twinning. The Ru50 Ta50 alloy is of the most excellent MT behavior among these RuTa alloys.

Original languageEnglish
Pages (from-to)36-40
Number of pages5
JournalMaterials Science and Engineering A
Volume348
Issue number1-2
DOIs
Publication statusPublished - 2003 May 15
Externally publishedYes

Keywords

  • Composition
  • Heat treatment
  • Martensitic transformation
  • RuTa
  • Shape memory alloy

ASJC Scopus subject areas

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

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