Wires of superelastic nickel-titanium alloy and methods of forming the same
AssigneeW. L. Gore & Associates, Inc.
InventorParikshith K. Kumar
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Abstract
A nickel-titanium alloy with an average grain size of between 0.2 and 10 microns and a recoverable strain of greater than 9% is disclosed herein, in which the alloy is formed using a method which involves applying a shape set heat treatment to the nickel-titanium alloy. The heat treatment includes applying heat at a temperature between 225° C. and 350° C. for a period of time between 20 and 240 minutes.
Claims5
A nickel-titanium alloy having a recoverable strain of greater than 9% increase in length of an initial total length of the alloy, wherein the nickel-titanium alloy undergoes a residual elongation of less than 0.5% of the initial total length of the alloy in response to applying the recoverable strain and removing the recoverable strain such that the alloy recovers greater than 94% of the increased length resulting from the recoverable strain.
Dependencies are inferred from the claim text.