C - Chemistry – Metallurgy – 22 – F
Patent
C - Chemistry, Metallurgy
22
F
148/30
C22F 1/00 (2006.01)
Patent
CA 1316437
ABSTRACT OF THE DISCLOSURE In the present application, a process has been disclosed that controls and adjusts the physical and mechanical properties of a shared memory alloy (SMA). The physical properties include, but are not limited to, trans- formation temperatures of the various SMA phases, the result- ing hysteresis between such phases, suppression of the Martensite phase in relation to the Rhombohedral phase, and the relationship between the start and finish temperatures of the respective phases. Mechanical properties that are controlled and adjusted include, but are not limited to, the yield point, ultimate tensile strength, and ductility. This has been accomplished by the introduction of a known internal stress and the distribution of that stress in the SMA prior to final fabrication of the SMA to a desired shape and prior to imparting memory through a predetermined heat treatment schedule.
596022
Abujudom David N. II
Fabiabi Sepehr
Thoma Paul E.
Abujudom David N. II
Baker Harold C.
Fabiabi Sepehr
Johnson Controls Inc.
Johnson Service Company
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