Patent ID: 7628874
Filing Date: 2009-12-08
Classification: C22C,C22F

Abstract:
1. A method of processing at least two nickel-titanium alloys having different compositions comprising from greater than 50 up to 55 atomic percent nickel to provide a desired austenite transformation temperature, the method comprising: selecting the desired austenite transformation temperature; and thermally processing the nickel-titanium alloys to adjust an amount of nickel in solid solution in a TiNi phase of each of the alloys such that a stable austenite transformation temperature is reached during thermally processing the nickel-titanium alloys, wherein the stable austenite transformation temperature is essentially equal to the desired austenite transformation temperature, wherein each of the nickel-titanium alloys comprises sufficient nickel to reach a solid solubility limit during thermally processing the nickel-titanium alloys.