Metal treatment – Stock – Mechanical memory
Patent
1996-12-18
1999-12-14
Wyszomierski, George
Metal treatment
Stock
Mechanical memory
148407, 148409, 148563, C22C 1400, C22C 1903, C22K 100
Patent
active
060011955
ABSTRACT:
To remarkably improve shape memory properties without the need for strictly controlling the composition, the present invention provides a Ti--Ni-based shape-memory alloy having a titanium content within a range of from 50 to 66 atomic %, which comprises an amorphous alloy heat-treated at a temperature of from 600 to 800 K., in which sub-nanometeric precipitates generating coherent elastic strains are formed and distributed in the bcc parent phase(B2).
REFERENCES:
patent: 5149381 (1992-09-01), Grewe et al.
patent: 5588466 (1996-12-01), Benz et al.
S. Miyazaki et al., "Shape Memory Characteristics of Sputter-Deposited Ti-Ni Thin Films" Materials Transactions, JIM, v. 35, No. 1 (1994), pp. 14-19.
S. Kajiwara et al., "Strengthening of Ti-Ni shape-memory films by coherent subnanometric plate precipitates", Philosophical Magazine Letters, 1996, V. 74, No. 3, pp. 137-144.
S. Kajiwara et al., "Formation of nanocrystals with an identical orientation in sputter-deposited Ti-Ni thin films", Philosophical Magazine Letters, 1996, V. 74, No. 6, pp. 395-404.
Kajiwara Setsuo
Kikuchi Takehiko
Matsunaga Takeshi
Miyazaki Shuichi
Ogawa Kazuyuki
National Research Institute for Metals
Wyszomierski George
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