Temperature memory effect of Ti50Nb30CU20 (at.%) alloy

After the reverse thermal induced martensitic transformation process of shape memory alloy is arrested at a temperature between the reverse transformation start and finish temperatures (A(s) and A(f)), and then cooled to a temperature below M-f, a kinetic stop will occur in the next heat flow curve during the heating process. The kinetic stop is closely related to the arrested temperature. This phenomenon is called temperature memory effect (TME). TME of Ti50N60Cu20 (at.%) shape memory alloy with phase transformation between B2 austenite and B19 martensite has been investigated by differential scanning calorimeter in this paper. The results indicate that TME of Ti50Ni30Cu20 alloy only exists in the heating process. (c) 2005 Elsevier B.V. All rights reserved.