|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||The Impact of Aluminum on the Microstructure and Deformation Behavior in Medium-Mn TRIP Steels
||Devesh Misra, Bing Yu, Yashwanth Injeti
|On-Site Speaker (Planned)
The objective of the study described here is to fundamentally elucidate the impact of aluminum-content in transformation-induced steels with particular emphasis on microstructure and its contribution to deformation mechanism. The increase of aluminum-content in TRIP steels led to decrease in tensile strength and increase in elongation, however, the critical parameter, product of tensile strength and elongation, representative of formability was significantly enhanced. The change in deformation mechanism from strain-induced martensite (transformation-induced plasticity: TRIP) in low Al-steel to combination of TRIP and mechanical twinning (twinning-induced plasticity: TWIP) in high Al steels is attributed to increase in stacking fault energy (SFE) with increase in Al-content such that austenite is more stable. The difference in mechanical properties of the experimental steels was reflected in the fracture behavior.
||Planned: Supplemental Proceedings volume