Crystallographic features of lath martensite in low-carbon steel
Crystallographic features of lath martensite in low-carbon steel
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DOI：
10.1016/j.actamat.2005.11.001
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发表时间：
2006-03-01
期刊：
影响因子：
9.4
通讯作者：
Minamino, Y
中科院分区：
文献类型：
--
作者：
Kitahara, H;Ueji, R;Minamino, Y
本文用电子背散射衍射和场发射扫描电子显微镜对0.20%碳钢中的板条马氏体组织进行了晶体学分析。阐明了原始奥氏体晶粒尺寸级或更大的板条马氏体组织的晶体学特征。虽然马氏体晶体的取向分散在理想的变体取向周围，但该钢中的马氏体保持Kurdjumov-Sachs（K-S）取向关系。详细说明了用K-S取向关系对马氏体（铁素体）相进行晶体学分析的步骤。变体分析表明，所有24种可能的变体不一定出现在单个原始奥氏体晶粒内，并且所有6种变体不一定出现在每个包内。两个变体的特定组合出现在局部区域（子块）内，表明变体选择的严格规则。原始奥氏体晶界和大部分包边界被清楚地识别。然而，很难确定子区块内的区块边界。(c)2005 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
Electron backscattering diffraction with field-emission scanning electron microscopy was used to analyze crystallographically the lath martensite structure in a 0.20% carbon steel. The crystallographic features of the lath martensite structure, of the order of the prior austenite grain size or larger, were clarified. Although the orientations of the martensite crystals were scattered around the ideal variant orientations, the martensite in this steel maintained the Kurdjumov-Sachs (K-S) orientation relationship. The procedures of the crystallographic analysis of the martensite (ferrite) phase with the K-S orientation relationship were explained in detail. Variant analysis showed that all 24 possible variants did not necessarily appear within a single prior austenite grain and that all six variants did not necessarily appear within each packet. Specific combinations of two variants appeared within local regions (sub-blocks), indicating a strict rule for variant selection. Prior austenite grain boundaries and most of the packet boundaries were clearly recognized. However, it was difficult to determine the block boundaries within the sub-blocks. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.