本文用金相显微镜观察Cu-Zn-Al合金中热弹性马氏体的长大过程,结果发现,马氏体片无论在径向或厚度方向,均为热弹性地(即可逆地)长大。这与Cohen等的观点不同。本文提出了一个模型,并通过计算来解释上述现象。
The growth of thermoelastic martensit6 in a Cu-29%Zn-3%Al alloy has beeninvestigated experimentally and theoretically. The metallographic observations showed that thegrowth occurred thermoelastically, i. e. reversibly, in the radial direction as well as in thethickening direction. This is not consistent with the theories of Cohen and some others. A modelhas been suggested by the authors to explain the thermoelastidty of the growth. The basic ideais: the elastic strain distribution is highly heterogeneous and the growth is controlled by thelocal elastic strain energy at the growth frontier area. The calculation results from the modelbased on Eshelby's theory are consistent with the observations.
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