| 摘要 |
PROBLEM TO BE SOLVED: To provide a Cu shape memory alloy in which transformation point temperature (Ms point) can easily be controlled over a wide range only by a heat treatment even though the alloy has the same composition. SOLUTION: The shape memory alloy has an apparent Zn content of 35.5 to 50 wt.%, and has a crystal structure consisting of aβphase capable of martensitic transformation, and the other crystal phases, and the transformation temperature (Ms point) of the crystal structure can optionally be set according to the difference in heat treatment temperature. The other crystal phases consist of anαphase and/or aγphase, and the area ratio of theβphase is 30 to 99%. COPYRIGHT: (C)2004,JPO |
