PURPOSE:To obtain reduced residual stress as well as a transformation temp. as low as =30 deg.C As point by incorporating Ti, Ni, and Cu in a proportion shown in a prescribed formula and by carrying out heat treatment at prescribed temp. after cold working. CONSTITUTION:The Ti-Ni-Cu shape memory alloy has a composition represented by the formula Ti100-xNix-yCuy [where (x)=51-53 and (y)=5-10] in atom%, and is obtained by heat treatment at 400-600 deg.C after cold working. This alloy provides reduced residual stress as well as the low transformation temp. where prolonged repeatable life longevity can be obtained.
展开▼
