A highly plastic Ni50Mn25Cu18Ga7 high-temperature shape memory alloy

作者：Wang Jingmin; Bai Haoyu; Jiang Chengbao^*; Li Yan; Xu Huibin

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2010, 527(7-8): 1975-1978.

DOI：10.1016/j.msea.2009.12.021

• Ni2MnGa
• High-temperature shape memory alloys (HTSMAs)
• Martensitic transformation
• Mechanical properties
• Plasticity

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, Ni50Mn25Cu18Ga7, with the martensitic transformation at 615 degrees 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.

• 出版日期2010-3-25
• 单位北京航空航天大学