Paper Title:
Effects of Annealing on Phase Transformation and Mechanical Behaviors of NiTi Shape Memory Alloy Ultra Thin Sheet
  Abstract

The phase transformation and mechanical behaviors of cold-rolled NiTi shape memory alloys ultra-thin sheet with 100μm in thickness are investigated. The transformation behaviors of the NiTi sheet are found to be remarkably influenced by heat treatment using electric resistance vs. temperature measurements. The martensitic transformation temperature reduced by annealing at 400°C or 600°C, and R-phase transformation appears when annealing at 400°C. The martensitic reorientation occurs when the NiTi sheets annealed at 400°C is deformed at room temperature and the maximum shape memory strain is 3.5% at 100% recovery ratio. For the NiTi sheets annealed at 600°C, a superelastic strain of 5% and a transformation stress about 500MPa are achieved.

  Info
Periodical
Materials Science Forum (Volumes 546-549)
Edited by
Yafang Han et al.
Pages
2257-2260
DOI
10.4028/www.scientific.net/MSF.546-549.2257
Citation
L. J. Meng, Y. Li, X. Q. Zhao, H. B. Xu, "Effects of Annealing on Phase Transformation and Mechanical Behaviors of NiTi Shape Memory Alloy Ultra Thin Sheet", Materials Science Forum, Vols. 546-549, pp. 2257-2260, 2007
Online since
May 2007
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$32.00
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