本文对Fe 29.37Ni-0.34C合金中的马氏体形态和亚结构进行了研究,试样经过两次分级冷却后,通过彩色金相和薄膜透射电镜研究表明,在不同的温度下,存在着透镜片状、中突片状和薄片状三种不同形态的马氏体。中突片状马氏体具有强烈的中间突起的表面浮突,对称双孪晶或半孪晶半位错的亚结构等特征,这种马氏体的形成可用应力诱发复生的机制来描述。
A new "mid-relief" plate martensite was observed together with lenti-cular plate and thin plate martensites in the specimen of Fe-29.37Ni-0.34C alloyafter twice fractiona lcooling: -100/-120℃,-120/-140℃,-155/-165℃ and -165/-196℃, by means of colour metallography and TEM. Those 3 types of martensiteswere formed as the temperature decreases. The "mid-relief" plate martensite ischaracterized by the marked mid-relief, and the substructure of the symmetric doubletwins or half twins and half dislocations. The formation of this martensite wouldbe interpreted by the stress-induced mechanism of martensite.
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