|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||Mechanical Behavior of a TWIP Steel (Fe-Mn-C-Al-Si) under Tension and Compression Loads.
||Xiaoxue Chen, Jianguo Li, Laszlo Kecskes, Qiuming Wei
|On-Site Speaker (Planned)
The strain hardening mechanism of a medium-Mn lightweight Fe-15Mn-2.5Si-2Al twinning induced plasticity (TWIP) steel has been experimentally investigated as a function of strain rate under uniaxial tension and compression. This steel is characterized by a constant strain hardening rate accompanied by high strength and high ductility under tension (i.e. yield strength: ~600 MPa, ultimate tensile strength: ~1600 MPa, elongation to fracture: ~50%, strain hardening exponent: ~0.35). The dynamic mechanical properties were studied using a Split-Hopkinson (Kolsky) pressure bar system with the strain rate of ~3500/s and 6000/s. Pole figure analysis and mechanical behavior reveal that the studied steel is isotropic with only mild texture. The strain rate sensitivity and the activation volume for plastic deformation are used to describe the deformation kinetics. Based on these results, supplemented by X-ray diffraction, Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM), an overview of the hardening behavior will be depicted.
||Planned: Supplemental Proceedings volume