Wide range temperature memory effect of an in-situ NiTi alloys composite

An incomplete transformation cycle induces a kinetic stop in the following complete transformation cycle in shape memory alloys. Therefore, the kinetic stop can be regarded as a memory of the previous arrest temperature. Herein, we show that the temperature memory effect of a TiNi shape memory alloy can be expanded to be operational in a very wide temperature range by designing the shape of the original surface curve and cold rolling, which may be exploited for various practical applications.