Effect of pre-strain on martensitic transformation of Ni43Mn43Co7Sn7 high- temperature shape memory alloy
- Chen, F.
- Tong, Y. X.
- Tian, B.
- Li, L.
- Zheng, Y. F.
DOIAbstract
In the present work, the effect of pre-strain on martensitic transformation of Ni43Mn43Co7Sn7 (at.%) alloy was investigated. The results show that Ni43Mn43Co7Sn7 alloy undergoes a martensitic transformation at 288 degrees C upon cooling. The thermal cycling does not affect the transformation behavior of the alloy, indicating the good thermal stability. The reverse transformation of the deformed martensite is pre-strain dependent. When the pre-strain is higher than 7.5%, the reverse transformation occurs in two-stage manner upon first heating due to the nonuniform martensite deformation. In contrast, during the first martensitic and second reverse transformation, the pre-strain shows little effect on the transformation temperatures. (C) 2010...
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