The strain rate sensitivity behavior in Ti based shape memory alloys

Abstract

Strain-rate sensitivity (SRS) and shape memory effect were investigated in Ti-Cr-Sn β(bcc)-Ti shape memory alloys using strain-rate dip test. There was a trade-off relation between shape recovery strain and SRS. This means that SRS becomes more significant, whereas the shape recovery strain decreases with increasing Cr content. This change in SRS is considered to be a transition of deformation mechanism from non-thermal activation process to thermal activation process with increasing stability of β phase.