Deformation behavior at rolling and tension under current in TiNi alloy

Abstract

The paper presents data on pulse current effects on deformability, strength and ductility of shape memory TiNi alloy, processed by electroplastic rolling (EPR). It was found that deformability and elongation to failure can be enhanced by electropulse current. It has considered deformation behavior of the TiNi alloy both at EPR processing and tension with pulse current. It is shown that EPR increases significantly strain to failure and refines microstructure to grain size less 100 nm. Stresses jumps up and down were observed on the stress-strain curves at tension with current. Different direction of stress jumps is conditioned by martensite transformation and electroplastic effect, correspondingly.