Promotion effect of hydrogen on nanoindentation creep and recovery of nanoindentation in Ni50Mn30Ga20ferromagnetic shape memory alloy

作者：Shen, Lian-Cheng^*; Su, Yan-Jing; He, Jian-Ying; Li, Jin-Xu; Chu, Wu-Yang; Qiao, Li-Jie

来源：Journal of University of Science and Technology Beijing, 2010, 32(10): 1306-1310.

• Effect of hydrogen
• Ferromagnetic shape memory alloy
• Nanoindentation creeps
• Partial recovery
• Polycrystalline
• Promotion effects
• Pseudoelasticity
• Reversible martensitic transformation

The effect of hydrogen on nanoindentation creep at room temperature and plastic deformation of nanoindentation in preferentially orientated polycrystalline Ni50Mn30Ga20was investigated by nanoindentation. The results show that nanoindentation creep in the preferentially orientated polycrystalline Ni50Mn30Ga20could occur at room temperature. After the specimens was hydrogen charged in vacuum at room temperature, the introduced hydrogen could not only promote the nanoindentation creep, but also release the elastic energy stored in martensitic pseudoelasticity and induce reversible martensitic transformation, which resulted in the partial recovery of plastic deformation.

• 出版日期2010-10
• 单位北京科技大学