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A highly plastic Ni50Mn25Cu18Ga7 high-temperature shape memory alloy

✍ Scribed by Jingmin Wang; Haoyu Bai; Chengbao Jiang; Yan Li; Huibin Xu

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
557 KB
Volume
527
Category
Article
ISSN
0921-5093

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✦ Synopsis

Since the discovery of NiMnGa shape memory alloys, including the ferromagnetic shape memory alloys and high-temperature shape memory alloys, the severe brittleness, especially the grain-boundary brittleness, has been a crucial bottleneck hindering their development. Here, high plasticity is reported in a high-temperature shape memory alloy, Ni 50 Mn 25 Cu 18 Ga 7 , with the martensitic transformation at 615 β€’ C and face-centered tetragonal martensite. The tensile stress and strain are 488.7 MPa and 11.7%, respectively. A compressive true strain of 70% is monitored without fracture.

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