Effect of phase transformation on localized deformation in Ti-Ni shape memory alloy

Xiaoping Jiang, Moritaka Hida, Yoshito Takemoto, Akira Sakakibara, Shuzo Fujii

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1 Citation (Scopus)

Abstract

Localized deformation of Ti-50.6at. pct Ni shape memory alloy subjected to tensile loading at different temperatures (≳Af) was studied by means of the observation of internal structure. The rolled sheet specimens were subjected to three types of heat treatments, i.e. annealing at 673K (AC), solution-treatment at 1173K (AQ), and aging at 873K after solution-treatment (AS). It was found AQ and AS specimens that the deformation after the yielding in tensile test was caused by the stress-induced martensite (SIM) transformation, and also by the movement of dislocations which was restricted in martensite bands. The deformation in AQ and AS specimens, therefore, were more localized than in AC specimen where the dislocations were introduced both in the matrix and martensite.

Original languageEnglish
Pages (from-to)411-416
Number of pages6
JournalZairyo/Journal of the Society of Materials Science, Japan
Volume45
Issue number4
DOIs
Publication statusPublished - Apr 1996

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Keywords

  • A transformation temperature
  • Dislocations
  • Ductile fracture
  • Localized deformation
  • Martensite band
  • Phase transformation
  • Stress -induced martensite (SIM)

ASJC Scopus subject areas

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

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