Multistage serrated flow behavior of a medium-manganese high-carbon steel

作     者：J.Chen Y.Zhang J.J.Wang C.M.Liu S.X.Zhao J. Chen;Y. Zhang;J.J. Wang;C.M. Liu;S.X. Zhao

作者机构：Key Laboratory for Anisotropy and Texture of MaterialsMinistry of EducationNortheastern UniversityShenyang 110819LiaoningChina Shenyang Industrial Transformation Upgrading Promotion CenterShenyang 110083LiaoningChina The State Key Laboratory of Rolling and AutomationNortheastern UniversityShenyang 110819LiaoningChina School of Materials Science and EngineeringNortheastern UniversityShenyang 110819LiaoningChina Central Research InstituteBaoshan Iron&Steel Co.Ltd.Shanghai 201999China 

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

年 卷 期：2020年第27卷第9期

页      面：1064-1072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：The authors gratefully appreciate the financial support by the National Natural Science Foundation of China(Grant Nos.U1860201 and U1960115) the Basic Research Program of Key Laboratory of Liaoning Province(LZ2015035) 

主　　题：Serrated flow Deformation mechanism Deformation twin Twinning-induced plasticity Transformation-induced plasticity 

摘      要：The deformation mechanisms and the flow stress behavior of a medium-manganese high-carbon steel during cold deformation at a strain rate of 10×5 s^-1 were explored using a universal testing machine,an X-ray diffractometer,a field emission scanning electron microscope and a high-resolution transmission electron *** results show that continuous step-up serrated flow behavior appears after the yielding point,and the true stress-strain curve is roughly divided into five stages based on distinctive densities and amplitudes of *** strengthening mechanisms of the experimental steel involve Cottrell atmosphere,twinning-induced plasticity(TWIP)efect and transformation-induced plasticity(TRIP)*** effect is the dominant deformation mechanism,and deformation twins formed by TWIP effect comprise primary,secondary and ***,TRIP effect arises in the local high-strain *** element plays a key role in the transformation of the deformation mechanism.A small amount of carbide precipitates around twin boundaries lead to the formation of local carbon-poor regions,and Md temperature and stacking fault energy of medium-manganese high-carbon steel are propitious to the occurrence of TRIP *** addition,the contributions of various deformation mechanisms to plasticity are calculated,and that of TWIP effect is the greatest.