A high-temperature shape-memory alloy Ni[sub 54]Mn[sub 25]Ga[sub 21]

Xu, Huibin; Ma, Yunqing; Jiang, Chengbao
May 2003
Applied Physics Letters;5/12/2003, Vol. 82 Issue 19, p3206
Academic Journal
A high-temperature shape-memory alloy, Ni[SUB54]Mn[SUB25]Ga[SUB21], was developed with a shape-memory effect of 6.1% and a martensitic transformation temperature higher than 250 °C for single crystals. The measured compressive strength and strain were 845 MPa and 20.5%, respectively, with a compressive axis along the growth direction of the rods at room temperature. One thousand thermal cycles were performed on the Ni[SUB54]Mn[SUB25]Ga[SUB21] without obvious changes of the martensitic structure, transformation behavior, and shape-memory effect, indicating an excellent thermal stability for the present alloy.


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