Microstructure, martensitic transformation and mechanical properties of Ni50Mn30Ga20−xCux ferromagnetic shape memory alloys
Microstructure, martensitic transformation and mechanical properties of Ni50Mn30Ga20−xCux ferromagnetic shape memory alloys
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DOI：
10.1016/j.jallcom.2012.05.121
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发表时间：
2012-10
影响因子：
6.2
通讯作者：
C. Tan;G. Dong;L. Gao;J. Sui;Z. Gao;W. Cai
中科院分区：
文献类型：
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作者：
C. Tan;G. Dong;L. Gao;J. Sui;Z. Gao;W. Cai
采用光学显微镜、差示扫描量热仪和X射线衍射仪研究了部分Cu替代Ga对Ni50Mn30Ga20−xCux合金显微组织、马氏体相变和力学性能的影响。结果表明，Ni50Mn30Ga20−xCux合金具有热弹性马氏体相变特征。随着铜含量的增加，Ni50Mn30Ga20−xCux样品的马氏体相变温度显著提高，室温下合金的马氏体组织由7M转变为未调变的T马氏体。此外，随着铜含量的增加，合金的抗压强度和断裂应变明显提高，这可以归因于固溶强化。
The effect of partial substitution of Cu for Ga on the microstructure, martensitic transformation and mechanical properties of Ni50Mn30Ga20−xCuxalloys was investigated by optical microscope (OM), different scanning calorimetry (DSC) and X-ray diffraction (XRD). The results show that the Ni50Mn30Ga20−xCuxalloys exhibit thermoelastic martensitic transformation. The martensitic transformation temperatures of the Ni50Mn30Ga20−xCuxsample increase remarkably with increase of Cu content, while the martensite structure of these alloys changes from 7M to non-modulated T martensite at room temperature. In addition, the compressive strength and fracture strain of alloys are clearly enhanced with increase of Cu content, which can be attributed to the strengthening of solution.