|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced High-Strength Steels
||Effect of Microstructure on Formability and Micro Fracture Mechanism in DP Steel for Automotive Outer Panel
||Yeon-sang Ahn, Chang-hyo Seo, Sang-Ho Han, In-Shik Suh, John Speer
|On-Site Speaker (Planned)
Application of high strength steel to automotive outer panels such as doors, hoods, fenders and deck-lids has accelerated due to the need for superior dent resistance and overall vehicle weight reduction. DP steel with 490MPa minimum tensile strength has recently been developed to replace bake hardening steel with 340MPa tensile strength. In the near future, DP grades for exposed application are expected to be extended to 590 MPa minimum tensile strength, to achieve even further light-weighting. For the application of higher strength of DP steel to exposed outer panels, excellent formability is required to prevent cracking during cold forming, along with surface quality and other critical characteristics. In this research, the effect of microstructure on formability and micro fracture mechanisms in DP steel for automotive outer panels has been studied. Especially, key microstructural factors to improve formability and to delay ductile micro-fracture will be discussed in relation to alloy composition, heat treatment process details and phase transformation behavior.
||Planned: Supplemental Proceedings volume