Shape Memory and Superelasticity

, Volume 3, Issue 1, pp 57–66 | Cite as

Effect of Cold Work and Partial Annealing on Thermomechanical Behaviour of Ti-50.5at%Ni

  • Abdus Samad Mahmud
  • Zhigang Wu
  • Hong Yang
  • Yinong Liu
SPECIAL ISSUE: FUNCTIONAL PERFORMANCE OF SHAPE MEMORY ALLOYS, INVITED PAPER
First Online:

Abstract

This study investigated the effect of cold work and partial annealing on the thermal and mechanical behaviour of NiTi. It is well understood that the thermomechanical properties of near-equiatomic NiTi are highly dependent on the microstructure, and hence the history of thermomechanical treatments has undergone through. It has been generally accepted that a sufficiently high cold work is necessary prior to annealing but detailed knowledge of the influence of the level of prior cold work on annealing is unclear. This study determined the threshold effective levels of cold work required for annealing and demonstrated that the thermal and mechanical properties of Ti-50.5at%Ni are sensitive to the level of cold work as well as temperature of partial annealing.

Keywords

Martensitic phase transformation Heat treatment Shape memory alloy NiTi Superelasticity 
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Notes

Acknowledgement

The authors acknowledge the financial support of Australian Research Council in Grant DP160105066.

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Copyright information

© ASM International 2017

Authors and Affiliations

  • Abdus Samad Mahmud
    • 1
    • 2
  • Zhigang Wu
    • 1
  • Hong Yang
    • 1
  • Yinong Liu
    • 1
  1. 1.School of Mechanical and Chemical EngineeringThe University of Western AustraliaCrawleyAustralia
  2. 2.School of Mechanical EngineeringUniversiti Sains MalaysiaNibong TebalMalaysia

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