The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 1987
Filed:
Sep. 06, 1985
Tohoku Metal Industries Ltd., Miyagi, JP;
Abstract
A reversible shape memory (R.S.M.) article of Ti-Ni alloy containing excess Ni over the stoichiometric composition, such as containing 50.3-53.0 at. % Ni which has a dual phase structure of a TiNi compound phase and a precipitated Ni rich compounds phase and the improved R.S.M. property wherein the different two shapes are recovered by thermal cycles between two temperatures sufficient higher and lower than the martensitic transformation temperature (Ms). The alloy prepared by the melting method is heat-treated at 600.degree. C. or more to be made into a single phase of TiNi compound after being worked into a strip plate, and the plate is fixedly wound on a pipe and aged at 300.degree. C.-600.degree. C. for one or more hours, whereby the article having the R.S.M. property with a large amount of shape change by thermal cycles can be obtained.