Effect of the Deformation Twin Density on the Corrosion Behavior in TWIP Steel

作     者：CHU Guo-dong,WEI Ying-hui,LI Da-zhao,TIAN Yun (College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China) 

作者机构：Taiyuan Univ Technol Coll Mat Sci & Engn Taiyuan 030024 Shanxi 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：331-336页

核心收录：

学科分类：0806[工学-冶金工程] 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 National Natural Science Foundation,P. R. China (51044007, 51001079) Scientific Research Plan of Shanxi Province of China (20090321072) National 863 plans projects (2007AA03Z555) for funding provided in support of this work 

主　　题：TWIP steel corrosion deformation twin 

摘      要：Based on its excellent tensile strength-ductility property combination,twinning-induced plasticity (TWIP) steel shows great potential in applications for structural components in automobile *** aim of this research is to investigate the corrosion resistance properties and corrosion mechanism under room temperature in TWIP *** influence of the deformation twin density on corrosion property was primarily considered by salt spray *** specimens used in the investigation are as-annealed and as-deformed *** microstructure and corrosion resistance property were characterized by scanning electron microscope (SEM),optical microscope (OM) and so *** are some annealing twins distributed randomly in austenitic grains in the as-annealed *** the specimen was subjected to tensile experiment,the density of the deformation twins increased sharply,which are different from the annealing twins in size and *** was found that the corrosion potential of the as-annealed is lower than that of the as-deformed and the corrosion current density behaves *** immersed in 5% NaCl solution salt spray for 48h,the as-deformed showed a bit better than the as-annealed in corrosion *** the time prolonged,the gap between the two specimens in corrosion resistance increased *** corrosion morphologies varied in color and *** investigation,carried out by SEM and EDS,indicated that as-annealed and the as-deformed followed pitting corrosion and uniform corrosion mechanism *** reason for the difference in corrosion mechanism is possibly the presence of the deformation *** deformation twins formed during the tensile test refine grains by way of *** twin boundaries largely belong to the coincidence site lattice (CSL),which is on lower energy *** suggests that the twins not only play a role in strengthening,but also improve effectively the corrosion resistance in TWIP steel.