Pseudo Elastic Cyclic Deformation of Ti-Ni Alloy under Various Temperatures

Abstract:

Scheme of pseudo elastic cyclic deformation of Ti49,4Ni50,6 wire (Ms=0±2oC) in 18-70оС temperature range included loading up to 4,3% elongation and unloading. It was shown that the parameters of the strain/stress patterns are strongly resulting from numbers of preliminary deformation cycles. Preliminary deformation cycling in the range of 3-4 percent provides stabilization after 10-15 cycles of the whole complex of mechanical properties including 30-50% increase of the stress during unloading, which is necessary to finish of the reverse martensitic transformation. Following cycling stabilizes all mechanical characteristics excluding one. An increase of numbers of preliminary deformation cycles (up to 50) results in monotonous decrease of the energy, which disappears during one cycle.

• Periodical: Materials Science Forum (Volumes 738-739)
• Pages: 332-337
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.738-739.332
• Online since: January 2013
• Authors: Dmitry E. Kaputkin, Tatiana V. Morozova, Elena V. Esina
• Keywords: Deformation Cycling, Shape Memory Alloy (SMA), Ti–Ni

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