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本文研究了CuZnAl合金在马氏体及马氏体相变时的阻尼性能。结果表明,在马氏体状态的内耗是一种M/M界面内耗,利用位错内耗理论的表达式可解释其变化规律。在马氏体相变区的内耗,包括M/M界面内耗及相变内耗两级分,其中相变内耗又由马氏体逆转变产生的内耗及应力诱发马氏体内耗两部分组成,并且前者占主导地位、合金阻尼性能的衰减与激振过程中引入的位错有关,并在一定振动次数后趋向一稳定值。
In this paper, the damping properties of CuZnAl alloy during martensitic and martensitic transformation were studied. The results show that the internal friction in the martensitic state is a kind of internal friction at M / M interface, and the variation rule can be explained by the expression of dislocation internal friction theory. In the martensitic transformation of the internal friction, including internal friction M / M interface and phase loss within the consumption of two fractions, which phase transformation of internal friction and martensitic transformation caused by internal friction and stress-induced martensitic internal friction two parts, and The former dominates. The attenuation of the damping properties of the alloy is related to the dislocation introduced in the excitation process and tends to a steady value after a certain number of vibration cycles.