Investigation on the Mechanical Properties at Room Temperature of Q and P Steel Sheet With Ultrahigh Strength

作     者：LIN Jian-ping 1,MIN Jun-ying 1,YE You 2,XIN Li-jiu 1,DING Lei 1 (1.College of Mechanical Engineering,Tongji University,Shanghai 201804,China 2.Pan Asia Technical Automotive Center Co Ltd.,Shanghai 201201,China) 

作者机构：Tongji Univ Coll Mech Engn Shanghai 201804 Peoples R China Pan Asia Tech Automot Ctr Co Ltd Shanghai 201201 Peoples R China 

出 版 物：《Journal of Iron and Steel Research International》 (钢铁研究学报(英文版))

年 卷 期：2011年第18卷第S1期

页      面：851-854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）] 

主　　题：Q and P steel mechanical property strain rate TRIP 

摘      要：Quenching and Partitioning (Q&P) steel is a new type ultrahigh strength steel with transformation induced plasticity (TRIP) effect. Uniaxial tensile experiments of the Q&P steel at room temperature were carried out to investigate the effects of sampling angle and strain rate on its mechanical properties. Experimental results show that the flow stress-strain curve, the hardening component n, the anisotropy coefficient through thickness r and the elongation of the Q&P steel are not sensitive to the sampling angle. However, the hardening component n and the elongation of the Q&P steel decrease with increasing the strain rate. Due to the Q&P steel with TRIP effect, when the strain rate greater, the deformation work will transform to the internal energy of specimen, and the TRIP effect of the Q&P steel will be inhibited, which results in less transformed retained austenite. X ray diffraction experiments were performed to verify it.