|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||Investigation on Sheared Edge Crack Susceptibility of the Third-generation Automobile Medium-Mn Steel
||Xiaodong Li, Shuo Han, Cunyu Wang, Ying Chang, Han Dong
|On-Site Speaker (Planned)
Application of high strength steel is the requirement of automobile industry. However, the crack occurs on the sheared edge during forming. The third-generation automobile medium-Mn (TAMM) steel was newly developed. It holds high plasticity and strength, however, the sheared edge crack is still unavoidable. In this study, the 5mm-thick TAMM steel is investigated by experiments and simulation to discuss the influence of shearing clearance on sheared edge crack susceptibility. The results show that the sheared edge crack is susceptible to the shearing clearance. The optimal shearing quality is obtained when the clearance is 2%*5mm ~ 5%*5mm. When the clearance is over 6.6%*5mm, micro-voids are observed by SEM and TEM to increase near the sheared edge, which decreases the plasticity. Therefore, the effective design of shearing clearance is favorable to reduce the occurrence of sheared edge crack, improve the formability and further promote the actual large-scale application of TAMM steel.
||Planned: Supplemental Proceedings volume