Mesomechanics of fcc-hcp Martensitic Transformation in Fe-Mn-Si-Cr-N Shape Memory Alloys

作者: 万见峰 , 陈世朴 :上海交通大学材料与科学工程学院,上海;

关键词: 细观力学fcc-hcp马氏体相变弹性应变能Fe-Mn-Si-Cr-N形状记忆合金 Mesomechanics fcc-hcp Martensitic Transformation Elastic Strain Energy Fe-Mn-Si-Cr-N Shape Memory Alloy




Based on the Eshelby’s micro-elastic theory, we calculated the elastic strain energy of single variant and multi-variants as well as the interaction energy between two variants in Fe-Mn-Si based shape memory alloys. The influence of N on the mesomechanics of martensitic transformation was studied. The results of theoretical calculations show that N increases the strain energy of phase transition as the resistance term. The strain energy of single variant is much bigger than the critical driving force of fcc-hcp transiton and much more than that of multi-variants, which is the main reason that it is difficult to get the thermal-induced single variant in Fe-Mn-Si based alloys. The elastic strain energy of multi-variants is greatly dependent on the probability of shear (p) and decreases with decreasing p. The calculation related to the shape factor (x) reveals that the thin plate of martensite has a small strain energy compared with the other lens-like martensite. The interaction energy between two martensites reduces quickly with their distance at first and changes slowly when their distance exceeds some critical value.

文章引用: 万见峰 , 陈世朴 (2013) Fe-Mn-Si-Cr-N形状记忆合金中fcc-hcp相变的细观力学。 应用物理, 3, 31-37. doi: 10.12677/APP.2013.32007


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