| 摘要 |
<p>There is described a process for preparing metal articles having the property of repeatedly reversible shape memory effect. The process comprises applying deformation stress to a .beta.-brass type martensitic Ni-Al alloy consisting essentially of 55 to 65 at % of Ni and the remainder Al at a temperature below Md point. The value of the deformation stress is within a range exceeding the first yield point of martensite crystal in the alloy beyond easy plastic flaw region but below the point at which a large amount of permanent strain is produced by glide deformation. The metal articles prepared by this process have excellent repeatedly reversible shape memory effects and other metallurgical properties such as durability, toughness and workability, and can be used in pressure, temperature, electrical, magnetic and optical sensing devices.</p> |
