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研究了形变对Ni-Mn-Ga合金马氏体相变及其组织形态的影响,并应用马氏体相变热力学和动力学探讨了适当塑性变形后马氏体相变滞后得以大幅度提高的微观本质。结果表明,随着应变量的增加,马氏体相变温度几乎保持不变,而其逆相变温度则迅速升高,塑性应变导致储存在界面处的弹性应变能的释放是塑性变形提高合金相变滞后的主导因素。
The effect of deformation on the martensitic transformation and microstructure of Ni-Mn-Ga alloy was studied. The martensite phase transformation hysteresis was also improved by using the thermodynamics and kinetics of martensitic transformation. Micro essence. The results show that as the amount of strain increases, the martensitic transformation temperature remains almost unchanged and the reverse phase transformation temperature increases rapidly. The plastic strain leads to the release of the elastic strain energy stored at the interface. The plastic deformation improves the alloy The dominant factor of the phase lag.