Martensite Transformation in NiTi Alloys Induced by Tensile Stress Pulses.

摘要

It is shown that tensile stress pulses generated by the reflection of compressive shock waves at a free surface induce martensitic transformation (from B2-CsCl to monoclinic structure), in equiatomic NiTi alloys. The transformation products are in the form of acicular needles with a micro-twined or dislocation substructure. 6 refs., 5 figs., 2 tabs.