Microstructure Characterization and Mechanical Properties of TRIP-aided Steel under Rapid Heating for Different Holding Time

作     者：De-chao XU Yan-dong LIU Jun LI Qing-ge MENG Pei LI 

作者机构：School of Materials and MetallurgyNortheastern UniversityShenyang 110819LiaoningChina Central Research Institute of BaosteelShanghai 201900China Shanghai JiaoTong UniversityShanghai 200240China 

出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)

年 卷 期：2016年第23卷第2期

页      面：138-144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：Item Sponsored by National Twelfth Five-year Science and Technology Support Program of China(2011BAE13B01 2011BAE13B03) 

主　　题：TRIP-aided steel rapid heating holding time austenite formation retained austenite 

摘      要：In order to develop a comprehensive understanding about the effect of different holding time under rapid heating on the microstructural evolution and mechanical properties of transformation-induced plasticity （TRIP） steel, continuous annealing process simulations were performed using a thermal system with resistance heating method. The morphology and distribution of all phases present in the microstructure and the mechanical properties of TRIP steel were revealed. It appeared that the final tensile strength of the TRIP steel increased and retained austenite car bon content decreased with increasing holding time. An overlap between ferrite recrystallization and austenitization was observed during intercritical holding. In addition, the work hardening of the samples was evaluated by calculat ing the instantaneous ~l value as a function of the true strain. The difference in work hardening behavior corresponds to the rate of the retained austenite transformation during straining, which can be attributed to the carbon content and the morphology of the retained austenite.