Investigation and Modeling of Austenite Grain Evolution for a Typical High-strength Low-alloy Steel during Soaking and Deformation Process

作     者：Ming-Jie Zhao Liang Huang Chang-Min Li Jia-Hui Xu Xu-Yang Li Jian-Jun Li Peng-Chuan Li Chao-Yuan Sun Ming-Jie Zhao;Liang Huang;Chang-Min Li;Jia-Hui Xu;Xu-Yang Li;Jian-Jun Li;Peng-Chuan Li;Chao-Yuan Sun

作者机构：State Key Laboratory of Materials Processing and Die&Mould TechnologySchool of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China China National Erzhong Group Deyang Wanhang Die Forging Co.LTDDeyang 618000China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2022年第35卷第6期

页      面：996-1010页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：funded by the National Key Research and Development Program of China(Grant No.2018YFB1106003) the National Natural Science Foundation of China(Grant No.51435007) the Fundamental Research Funds for the Central Universities,HUST(Grant No.2020JYCXJJ057) 

主　　题：High-strength steel Grain growth Dynamic recrystallization Grain size model Numerical simulation 

摘      要：The final mechanical properties of components greatly depend on their grain size. It is necessary to study the grain evolution during different thermomechanical processes. In the study, the real-time austenite grain evolution of a high-strength low-alloy(HSLA) steel during the soaking process is investigated by in situ experiments. The effects of different deformation parameters on the dynamic recrystallization(DRX) kinetic behaviors are investigated by hot compression experiments. Based on the observations and statistics of the microstructures at different thermomechanical processes, a unified grain size model is established to evaluate the effects of soaking parameters and deformation parameters on the austenite grain evolution. Also, the DRX kinetic model and critical strain model are established, which can describe the effects of the soaking process on the DRX kinetics process well. The established grain size model and DRX kinetic model are compiled into the numerical simulation software using Fortran language. The austenite grain evolution of the material under different deformation conditions is simulated, which is consistent with the experimental results. It indicates that the established model is reliable, and can be used to simulate and predict the grain size during different thermomechanical processes accurately.