Process for the improved ductility of nitinol

Details Process for the improved ductility of nitinol Process for the improved ductility of nitinol

1998-06-02

2000-08-22

Wyszomierski, George

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148675, C22F 110, C22K 100

Patent

active

061066427

ABSTRACT:
A process for treating nitinol so that desired mechanical properties are achieved. In one embodiment, the process comprises the steps of exposing the nitinol to a primary annealing temperature within the range of approximately 475.degree. C. to 525.degree. C. for a first time period, and thereafter exposing the nitinol to a secondary annealing temperature within the range of approximately 550.degree. C. to 800.degree. C. for a second time period. The invention also includes nitinol articles made by the process of the invention.

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