基于热力学理论，结合实验测量数据，计算了相变温度分别在室温以下、室温附近、室温以上3种情况下铁磁形状记忆合金NiMnGa单晶马氏体相变过程中的相关能量，并进行了分析．结果进一步表明：相变循环曲线分支的斜率取决于弹性应变能，而相变热滞后起源于相界面摩擦．%Based on the thermo - dynamical theory and some experimental data, the relevant energy contributions related to the thermoelastic martensitic transformation for three off - stoichiometrie NiMnGa single crystals with the transformation temperature below, near and above room temperature, respectively, were calculated, and their influence to the transformation behavior was discussed. The results identify further that for a completely thermoelastic martensitic transformation, the slope of the transformation loop results from the elastic strain energy, and the thermal hysteresis comes from the friction of interfacial motion.
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