Morphology, substructure and crystallography of lath martensite in Fe-C alloys
Morphology, substructure and crystallography of lath martensite in Fe-C alloys
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DOI：
10.1051/jp4:2003877
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发表时间：
2003-10
期刊：
影响因子：
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通讯作者：
T. Furuhara;S. Morito;T. Maki
中科院分区：
文献类型：
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作者：
T. Furuhara;S. Morito;T. Maki
在不同碳含量（0.0026 ~ 0.78 wt%C）的Fe-C合金中，研究了板条马氏体的形貌、晶体学和位错密度。在低碳合金（≤0.18%C）中，显微组织分析发现，在光学显微镜下观察到的马氏体块是由两组板条相互错开约10度组成的。这一结果与目前关于马氏体块体结晶学的观点有很大的不同，在这种观点中，块体中的板条是相同的变体。相比之下，一个块包含高碳合金（≥0.61%C）的单一变体的板条。随着碳含量的增加，块和包的大小被细化，而板条的大小没有显著变化。位错密度随碳含量的增加而增加。
Morphology, crystallography and dislocation density of lath martensite were examined in Fe-C alloys with various carbon contents (0.0026∼0.78 wt%C). It was found that, in low carbon alloys (≤ 0.18%C), a martensite block observed in optical microscopic scale consists of two groups of laths misoriented each other by about 10 degrees on analysis of microtexture. This result is largely different from the current view on the crystallography of martensite block, in which laths in a block is of the same variant. In contrast, a block contains laths of a single variant in high carbon alloys (≥0.61%C). As carbon content increases, block and packet sizes are refined whereas size of lath does not change significantly. Dislocation density largely increases with carbon content.