Effect of Strain Rate on Mechanical Properties and Microstructural Evolution of Bainite-based Quenching-Partitioning (BQ&P) Steel
WU Xian1, WANG Zhenqiang2
1 Engineering Training Center, Jilin University of Chemical Technology, Jilin City 132022,China;
2 College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001,China
Abstract: This paper investigated the effect of quasi-static and high strain rates on mechanical properties and microstructural evolution of BQ&P steel. The quasi-static compression tests were conducted using a universal testing machine at a strain rate of 0.001-0.1 /s, while the high strain rate impact tests were conducted using split Hopkinson pressure bar (SHPB) at a strain rate of 2200-3600/s. The results indicated that BQ&P steel exhibits stronger strain rate sensitivity during high strain rate impact processes. The Peierls mechanism is of great significance for BQ&P steel under quasi-static compression, and the carbon solute mechanism is the main deformation mechanism under high strain rate impact. There are BCC structured bainite/martensite, FCC structured RA, and HCP structured ε-martensite in BQ&P steel. Different deformations led to different transformations of the three phases, and EBSD analysis revealed different orientation relationships between the phases.
吴限, 王振强. 应变率对贝氏体淬火-碳配分（BQ&P）钢力学性能和组织演变的影响[J]. 吉林化工学院学报, 2025, 42(11): 32-40.
WU Xian, WANG Zhenqiang. Effect of Strain Rate on Mechanical Properties and Microstructural Evolution of Bainite-based Quenching-Partitioning (BQ&P) Steel. Journal of Jilin Institute of Chemical Technology, 2025, 42(11): 32-40.
