|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||On the Fracture Behavior of Twinning-induced Plasticity Steel
||Luo Zhichao, Huang Mingxin
|On-Site Speaker (Planned)
The present work focuses on the fracture behavior of a twinning-induced plasticity (TWIP) steel. The essential work of fracture (EWF) and critical J-integral for crack initiation (JIC) have been measured at 298 K and 573 K in order to investigate the role of deformation twins on the fracture behavior of a TWIP steel. We find that deformation twins are detrimental to fracture toughness at 298 K as quasi-cleavage fracture is induced by crack propagation along deformation twins. On the contrary, such quasi-cleavage fracture mode is circumvented at 573K as deformation twins are prohibited at this temperature, resulting in a higher fracture toughness. A physical model based on the emission of partial dislocations at the crack tip has been proposed to explain the twin-induced cleavage fracture in TWIP steels.
||Planned: Supplemental Proceedings volume