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US 10,119,176 B2Granted
Superelastic wire and method of formation
AssigneeRaytheon Company
InventorSunder S. Rajan
Life of this patent
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Abstract
A shape memory alloy including a Ni—Ti based alloy is superelastic at temperatures of about −40° C. to about 60° C. after being exposed to temperatures of about −55° C. to about 85° C. A method of forming a memory shape alloy may include preparing a rod comprising a Ni—Ti alloy, drawing a wire from the rod, and treating the wire at a temperature of about 500° C. to about 550° C. for about less than 1 minute.
Claims19
A shape memory alloy comprising:
- a Ni—Ti based alloy, wherein the Ni—Ti based alloy is superelastic at temperatures of −40° C. to about 60° C. after being exposed to temperatures of about −55° C. to about 85° C.,
- wherein the Ni—Ti based alloy has an ultimate tensile strength of about 200 KSI (about 1.38 GPa) to about 211 KSI (about 1.45 GPa).
A method of forming a shape memory alloy comprising:
- preparing a rod comprising a Ni—Ti based alloy;
- wherein the Ni-Ti based alloy is superelastic at temperatures of −40° C. to about 60° C. after being exposed to temperatures of about −55° C. to about 85° C., and wherein the Ni-Ti based alloy has an ultimate tensile strength of about 200 KSI (about 1.38 GPa) to about 211 KSI (about 1.45 GPa);
- drawing a wire from the rod;
- and
- treating the wire at a temperature of about 500° C. to about 550° C. for about less than 1 minute.
2 more elements
Dependencies are inferred from the claim text.