Effect of heat treatment temperature on nitinol wire

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • S. Cai
  • J. E. Schaffer
  • M. R. Daymond
  • C. Yu
  • Y. Ren

Detail(s)

Original languageEnglish
Article number071904
Journal / PublicationApplied Physics Letters
Volume105
Issue number7
Publication statusPublished - 18 Aug 2014
Externally publishedYes

Abstract

In-situ synchrotron X-ray diffraction has been used to study the influence of the heat treatment temperature on the subsequent micromechanical behavior of nitinol wire. It was found that increase in the heat treatment temperature rotated the austenite texture from the {332}B2 fiber towards the {111}B2 fiber, and the texture of the Stress-Induced Martensite phase changed from the (1 ̄ 40)B19' to the (1 ̄ 20) B19' fiber accordingly. Heat treatment at a low temperature reduces the internal residual strains in the austenite during super-elastic deformation and therefore improves the materials fatigue performance. The development of internal residual strains in austenite is controlled by transformation induced plasticity and the reversal martensite to austenite transformation. © 2014 AIP Publishing LLC.

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Citation Format(s)

Effect of heat treatment temperature on nitinol wire. / Cai, S.; Schaffer, J. E.; Daymond, M. R.; Yu, C.; Ren, Y.

In: Applied Physics Letters, Vol. 105, No. 7, 071904, 18.08.2014.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review