Reconstruction of the Three-dimensional Ferrite–austenite Microstructure and Crystallographic Analysis in the Early Stage of Reverse Phase Transformation in an Fe–Mn–C Alloy
Reconstruction of the Three-dimensional Ferrite–austenite Microstructure and Crystallographic Analysis in the Early Stage of Reverse Phase Transformation in an Fe–Mn–C Alloy
复制标题
Fe-Mn-C 合金逆相变早期三维铁素体-奥氏体微观结构的重建和晶体学分析
DOI：
10.2355/isijinternational.isijint-2017-441
复制
发表时间：
2018
影响因子：
1.8
通讯作者：
T. Kakeshita
中科院分区：
文献类型：
--
作者：
Kengo Hata;K. Fujiwara;K. Kawano;M. Sugiyama;T. Fukuda;T. Kakeshita
本文研究了铁素体加热转变为奥氏体形成的低碳钢中铁素体和奥氏体间的晶体取向关系及其界面。利用电子背散射测量和FIB连续切片技术，对反向相变早期淬火的样品进行了三维研究。通过对库尔德朱诺夫-萨克斯(K-S)关系变量的分析，确定了淬火组织中马氏体的优先奥氏体取向，并成功地重构了三维铁素体-奥氏体组织。三维组织的结晶学分析表明，逆变奥氏体核与相邻的两个或三个铁素体晶粒保持或接近K-S关系。通过统计评估，估计了反向转变奥氏体选择这些特定取向关系的意义。此外，还讨论了铁素体和奥氏体的结晶学关系对反相变形核和长大的影响。
We have investigated the crystallographic orientation relationship between ferrite and austenite and the interfacial planes between them of a low-carbon steel formed by the transformation from ferrite to austenite upon heating. Three-dimensional investigation using EBSD measurement with FIB serial sectioning technique is carried out on samples quenched from an early stage of the reverse transformation. The prior austenite orientation of martensite in the quenched microstructure is determined based on an analysis of the variants in the Kurdjumov–Sachs (K–S) relationship and the three-dimensional ferrite–austenite microstructure is successfully reconstructed. The crystallographic analysis on the three-dimensional microstructure has revealed that the nucleus of reverse-transformed austenite maintains the K–S relationship or close to it with two or three adjacent ferrite grains. The significance for reverse-transformed austenite to select these specific orientation relationships was estimated through a statistical assessment. In addition, the influence of crystallographic relationship between ferrite and austenite to nucleation and growth of reverse transformation is discussed.