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Cu-29％Zn-3％Al合金中存在热弹性马氏体转变。高压电镜(1000—1200kV)观察表明,母相(β′)为DO_3结构,马氏体(M)为18R结构;试样厚处(～1μm)的马氏体片内可见微小棍状晶体堆积成的精细组织,棍状体粗约10nm并有界面分开;马氏体的表面凹凸不平、极不规则。试样薄处的β′-M界面呈平坦状或规则的锯齿状、排列着平行的位错线簇。尽管电镜试样在金相显微镜下观察到转变的可逆性,而在电镜下则只观察到正转变(β′→M)。这可能是因薄箔试样不易储存弹性能的结果。
There is thermoelastic martensitic transformation in Cu-29% Zn-3% Al alloy. The results of high-pressure electron microscope (1000-1200kV) show that the parent phase (β ’) is DO_3 structure and the martensite (M) is 18R structure. The tiny stick crystals can be seen in the martensite sheet Into the fine tissue, stick roughly 10nm and have separate interfaces; martensitic surface uneven, very irregular. The thin β’-M interface at the sample is flat or regular jagged, with parallel clusters of dislocations arranged. Although electron microscope specimens were observed for reversibility of transformation under a metallographic microscope, only positive transformation (β ’→ M) was observed under electron microscopy. This is probably the result of the elastic properties of the thin foil specimen that are not easily stored.