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用静电音频内耗仪测试了Ｆｅ－Ｍｎ－Ｓｉ－Ｃｒ形状记忆合金在－１００～３００°Ｃ温度范围的内耗及模量变化，研究了γ→ε马氏体相变及其逆相变的内耗特征．结果表明，γ→ε马氏体相变及其逆相变具有不同的机制；在相变过程中未出现软模现象，可见该合金的层错形核可能无需点阵软化．相变过程中的模量变化归因于ε相的模量高于γ相的模量．
The internal friction and modulus change of Fe-Mn-Si-Cr shape memory alloy at temperature range of -100 ~ 300 ° C were tested by electrostatic audio internal friction instrument. The internal friction of γ → ε martensitic transformation and its reverse phase transformation feature. The results show that the γ → ε martensitic transformation and reverse phase transformation have different mechanisms. The soft mode does not appear during the phase transition. It can be seen that the layered miscognition of the alloy may not require lattice softening. The change in modulus during the phase change is attributed to the fact that the modulus of the ε phase is higher than the modulus of the γ phase.