Manufacturing of Advanced High Strength High Mn Steel
摘要
This study presents the effect of carbon content on the mechanical behavior of high Mn steelsHigh Mn steel. Fe–0.4%C–15%Mn and Fe–0.13%C–18%Mn alloys were manufactured from a commercial 1018 steel in an induction furnace. They were then hot rolledHot rolled in successive stages without reheating until a reduction of 80% (3 mm). The processed samples were characterized by optical microscopy—OM, Scanning Electron MicroscopyScanning electron microscopySEM and X-ray diffraction—DRXDRX. The results show the activation of different deformation mechanisms. On the one hand, the Fe–0.4%C–15%Mn steel reached a UTS > 1000 MPa with an elongation of 75%. Meanwhile, the Fe–0.2%C–18%Mn alloy presented a UTS = 900 MPa of UTS and 40% deformation. The results obtained were attributed to the observed microstructuralMicrostructural differences, on the one hand; the Fe–0.12%C–18%Mn alloy presented entirely TWIP behavior, while the Fe–0.4%C–15%Mn alloy exhibited a combined effect of twinning and γ → ε-(hcp) phase transformationPhase transformation.