冷变形对NiTiCr形状记忆合金超弹性的影响

Effect of Cold Deformation on Superelastic of NiTiCr Shape Memory Alloy

摘要:

通过测量NiTiCr形状记忆合金丝的恢复率和做拉伸实验来观察冷变形对其超弹性的影响.结果表明,不同的冷变形量对NiTiCr的超弹性有着显著的影响.当冷变形量超过27%时,NiTiCr丝的弹性随变形量的增加而显著增强,在变形量达到33%之后,弹性随变形量的变化不大.单纯的冷变形不能使NiTiCr丝呈现完全的非线性超弹性.同时讨论了实验弯曲次数与弹性稳定性之间的关系.

Abstract:

In this article, the effect of cool deformation on NiTiCr super-elastic was studied by measuring its resume rate and stretching experiment . The results show that the different cold deformation has evidence influence on the super-elastic of NiTiCr. The elastic increases obviously with the increase of the deformation when the cool deformation is over 27%. However, when the deformation is over 33%, the elastic is no more change. The mere cool deformation can not make NiTiCr to exhibit non-line super-elastic entirely. The dependence of the stability of elestic on the bending cycles is also discussed.