US2015354033A1PendingUtilityA1

Nickel-Titanium-Based Superelastic High-Temperature Shape Memory Alloys

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Individually held — no corporate assignee on recordPriority: Sep 19, 2013Filed: Sep 18, 2014Published: Dec 10, 2015
Est. expirySep 19, 2033(~7.1 yrs left)· nominal 20-yr term from priority
Inventors:Donald F. SusanRonald D. NoebeThomas E. BuchheitJordan E. MassadJohn R. DebassigeDonald R. BradleyMark ReeceNOEBE RONALD D
C22C 30/00C22F 1/10C22F 1/183C22F 1/006C22C 14/00C22C 19/03
49
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Claims

Abstract

Shape memory alloys containing Ni, Ti, and Pt or Pd display superelastic behavior. The superelasticity was shown in a range of temperatures around the austenite finish shape memory transformation temperature. The superelasticity range was approximately 210-280° C. for these alloys. Shape memory alloys that exhibit superelasticity at high temperatures will enable a new class of mechanical sensors and actuators.

Claims

exact text as granted — not AI-modified
We claim: 
     
         1 . A superelastic high temperature shape memory alloy comprising Ni 100-y-x Pt x Ti y  wherein x is greater than 13 and less than 18 atomic % and y is greater than 50 and less than 51 atomic %. 
     
     
         2 . The shape memory alloy of  claim 1 , wherein the alloy displays superelasticity between 210 and 280° C. 
     
     
         3 . The shape memory alloy of  claim 1 , wherein the alloy has a martensite start temperature between 150 and 250° C. 
     
     
         4 . The shape memory alloy of  claim 1 , wherein x is  15 . 5  to  16 . 5  atomic %. 
     
     
         5 . The shape memory alloy of  claim 4 , wherein the alloy displays superelasticity between 224 and 270° C. 
     
     
         6 . The shape memory alloy of  claim 4 , wherein the alloy has a martensite start temperature between 205 and 220° C. 
     
     
         7 . A superelastic high temperature shape memory alloy comprising Ni 100-y-x Pd x Ti y  wherein x is greater than 20 and less than 30 atomic % and y is greater than 50 and less than 51 atomic %. 
     
     
         8 . The shape memory alloy of  claim 7 , wherein the alloy displays superelasticity between 210 and 280° C. 
     
     
         9 . The shape memory alloy of  claim 7 , wherein the alloy has a martensite start temperature between 120 and 230° C. 
     
     
         10 . The shape memory alloy of  claim 7 , wherein x is 25 to 26 atomic %. 
     
     
         11 . The shape memory alloy of  claim 10 , wherein the alloy displays superelasticity between 219 and 240° C. 
     
     
         12 . The shape memory alloy of  claim 10 , wherein the alloy has a martensite start temperature between 195 and 200° C.

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