Variant selection of lath martensite and bainite transformation in low carbon steel by ausforming
JOURNAL OF ALLOYS AND COMPOUNDS(2013)
摘要
Variant selection of lath martensite and bainite transformed in an ausformed low-alloy low-carbon steel is analyzed quantitatively by applying reconstruction method of austenite orientation. It was found that transformation texture having {111}(alpha) and {0 1 1}(alpha) along compression axis is developed by ausforming both in martensite and bainite transformation. Development of such texture can be explained qualitatively from deformation texture in austenite without taking variant selection into account. However, their intensities cannot be reproduced quantitatively, indicating that specific variants are favorably selected by ausforming. Quantitative analyses of variant fractions revealed that martensite variants whose habit planes are nearly parallel to the primary and secondary slip planes in austenite are formed preferentially. Similar variant selection rule is observed in ausformed bainite while it is not as strong as in ausformed martensite. A preferential nucleation model is proposed for variant selection by ausforming in which variants with habit planes nearly parallel to the primary or secondary slip planes in austenite are nucleated on the microband boundaries in austenite introduced by compression. (C) 2011 Elsevier B.V. All rights reserved.
更多查看译文
关键词
Lath martensite,Steels,EBSD,Reconstruction,Variant selection
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要