Deformation and annealing behaviour of dual phase TWIP steel from the perspective of residual stress, faults, microstructures and mechanical properties

摘要: Abstract The present study aims to examine the deformation and annealing behaviour of Fe–0.07C–20Mn–2.6Si–1.6Al TWIP steel in viewpoint microstructural characterisation, fault analysis, triaxial residual stress measurement mechanism twin formation. 50% cold results improvement hardness tensile strength (428 HV 1419 MPa, respectively), whereas at 900 °C same leads ductility (61%) with decrease (873 MPa). is maximum compressive nature deformed sample which has been diminishing after annealing. Hot rolled hot rolled-solution treated samples develop dual phase microstructure along twins, fine nano twins high dislocation density are apparent deformation. presence Shockley partial dislocation, overlapping stacking faults, Lomer-Cottrell lock, intrinsic extrinsic faults affect mechanical properties as obstacles movements or assisting Goss Brass components texture dominating rolling, weakening rolling components. nucleation consistent pole deviation process. Hence work amplifies understanding on low carbon from different characterisation perspectives.