Body-centered cubic (BCC) {112}<111>-type twin is a common substructure ofquenched martensite in Fe-C alloys. Since the twin plays an important role inunderstanding the martensitic transformation mechanism, thus, the twinning structurehas received considerable attention. Transmission electron microscopy (TEM)observations and electron diffraction analysis have been carried out in detail onquenched carbon steels or Fe-C alloys with various carbon content (0.1~2.0 wt.%). Theresults have revealed that the twinned martensite exists in the above composition range,and all twins are the same twin with metastable ω-Fe phase at the twinning boundaryregion.
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机译：以体为中心的立方（BCC）{112} {112} <111> Type Twin是Fe-C合金中的QueConded Martensite的常见次结构。由于双胞胎起到了违反马氏体转变机制的重要作用，因此，孪生结构受到相当大的关注。透射电子显微镜（TEM）观察和电子衍射分析已经详细阐述了碳纤维或Fe-C合金，具有各种碳含量（0.1〜2.0重量％）。结果表明，在上述组成范围内存在孪生马氏体，并且所有双胞胎都是在孪晶边界处的衡量标准ω-Fe相的同一个双胞胎。
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