| Cu-based shape memory alloys are likely to occur intergranular fracture at low strain due to the high elastic anisotropy (A=2 CQ_(44)/(C_(11)-C_(12))=13-15), so their mechanical properties such as fracture strength, ductility and fatigue strength are poor. But a study to improve their properties has been doing extensively because of their easy of manufacturing and relatively low cost than that of Ni-Ti alloys. It has been known that the methods to improve properties of Cu-based shape memory alloys are additional elements method, powder metallurgical method and rapid solidification method etc. In the present work, both of additional elements method added Mn, Ti and powder metallurgical method used to HIP technology are applied simultaneously to improve the properties of the alloy and get the basic data for practical application. |
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