The Crystal Structure of As-quenched Fe-C Martensite
ISIJ INTERNATIONAL(2024)
摘要
Confusion exists in the literature as to whether the crystal structures are cubic or tetragonal in lath martensites of Fe-C alloys and low-alloy steels. Steels with a range of carbon contents have been quenched and examined by synchrotron x-ray diffraction. The presence of dislocations and residual local strains complicates the analysis since peak splitting of tetragonal lines is obscured by the broadening. Asymmetry of the 200,020/002 lines has been examined and synthesised using model peak functions. A new approach has been to study the 222 peaks which are unique (not split) for both cubic and tetragonal crystals. For low carbon steels (更多
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关键词
martensite,crystal structure,synchrotron diffraction,modelling.
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