An approach to prior austenite reconstruction
An approach to prior austenite reconstruction
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DOI：
10.1016/j.matchar.2012.01.010
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发表时间：
2012-04
影响因子：
4.7
通讯作者：
M. Abbasi;T. Nelson;C. Sorensen;Lingyun Wei
中科院分区：
文献类型：
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作者：
M. Abbasi;T. Nelson;C. Sorensen;Lingyun Wei
钢的搅拌摩擦焊（FSW）的一个感兴趣的领域是了解过程中的微观组织演变。大部分变形发生在奥氏体温度范围内。为了了解微观结构的演变，需要对原奥氏体微观结构进行定量微观结构测量。考虑到铁素体钢中的室温显微组织含有非常少的残余奥氏体至不含残余奥氏体的事实，需要从室温铁素体中恢复原始奥氏体显微组织。本文介绍了一种基于电子背散射衍射（EBSD）的贝恩区检测方法。采用贝恩区检测法重构原奥氏体晶粒结构。此外，一个单独的方法的基础上的相变取向关系，以恢复原奥氏体取向。
One area of interest in Friction Stir Welding (FSW) of steels is to understand microstructural evolution during the process. Most of the deformation occurs in the austenite temperature range. Quantitative microstructural measurements of prior austenite microstructure are needed in order to understand evolution of the microstructure. Considering the fact that room temperature microstructure in ferritic steels contains very little to no retained austenite, prior austenite microstructure needs to be recovered from the room temperature ferrite. In this paper, an approach based on Electron Backscattered Diffraction (EBSD) is introduced to detect Bain zones. Bain zone detection is used to reconstruct prior austenite grain structure. Additionally, a separate approach based on phase transformation orientation relationships is introduced in order to recover prior austenite orientation.