|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Advanced High Strength Steels V
||Microstructure-based Predictions of the Effect of Inclusions on the Bendability of Advanced High Strength Dual-phase Steels
||Yu Liu, Dongwei Fan, Ankit Srivastava
|On-Site Speaker (Planned)
Advanced high strength dual-phase steels are prone to fracture under bending-dominated manufacturing processes. Experiments suggest that the fracture of these steels under bending is extremely sensitive to the presence of subsurface non-metallic inclusions and the inclusions exhibit a rather discrete size effect on the bendability. Following this, we have carried out a series of microstructure-based finite element calculations of ductile fracture in a dual-phase steel under bending. To gain additional insight, we have also analyzed the effect of an inclusion on the bendability of a single-phase material. In the calculations, all the microstructural features are discretely modeled. In line with the experiments, strong inclusion size effect on the bendability of the dual-phase steel naturally emerge in the calculations. We have also carried out supervised machine learning to identify the contributions of individual features and isolate critical features that control the bendability of advanced high strength dual-phase steels.