Shape memory alloy

Details Shape memory alloy Shape memory alloy

1990-07-24

1992-04-28

Yee, Deborah

Metal treatment

Stock

Mechanical memory

420451, 420417, C22C 1900

Patent

active

051085232

ABSTRACT:
A shape memory alloy for repeated use, containing no noble metals. NiTiZr and NiTiZrCu shape memory alloys having A.sub.s temperature which lies above 100.degree. C. are disclosed. These shape memory alloys have the following composition: 41.5 to 54 atomic % Ni; 24 to 42.5 atomic % Ti and 7.5 to 22 atomic % Zr.

REFERENCES:
patent: 3832243 (1974-08-01), Donkersloot et al.
patent: 4283233 (1981-08-01), Goldstein
patent: 4950340 (1990-08-01), Wakita et al.
Shape Memory Alloys, ed. Hiroyasu Funakubo, pp. 84-85, 1987.
Eckelmeyer et al, "The Effect of Alloying on the Shape Memory Phenomenon in Nitinol", Scripta MET. vol. 10, 1976 pp. 667-672.
Kleinherenbrink et al "Control of the Transformation Temperatures of TiNi Shape Memory Alloys by Ternary Additions", Martensitic Transformation in Science & Technology, Mar. 1989, pp. 187-190.
Duerig et al, "A Shape-Memory Alloy for High Temperature Applications", Journal of Metals 34, Dec. 1982, pp. 14-20.
"Shape Memory Effects in Alloys", Plenum Press, the Metallurgical Society of AIME Symposium in Toronto, Ontario, Canada, May 19-22, 1975, five pages.
EPO Search Report, EP 90 11 4034.3, Jan. 8, 1991, four pages.

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