Improving mechanical properties of 18%Mn TWIP steels by cold rolling and annealing

The microstructures and mechanical properties of Fe-0.4C-18Mn and Fe-0.6C-18Mn steels subjected to large strain cold rolling followed by annealing werestudied. Cold rolling with a total reduction of 86% resulted in substantial strengthening at expense of plasticity. The yield strength and the ultimate tensile strength of above 1400MPa and 1600MPa,respectively,were achieved in both steels, whereas total elongation decreased below 30

Deformation mechanisms operating in TWIP/TRIP steels processed by warm to hot working

The mechanical properties of medium to high-Mn austenitic TWIP/TRIP steels subjected to warm to hot working were studied. The steel samples were processed by plate rolling at various temperatures ranging from 500 ◦C to 1150 ◦C. The deformation microstructures depend significantly on the rolling temperature. The discontinuous dynamic recrystallization readily developed during hot rolling at temperatures of T ≥ 800 ◦C, whereas the work hardened microstructures with high dislocation densities evolved by warm rolling at temperatures below 800 ◦

Grain sizes and dislocation densities in fcc-metallic materials processed by warm to hot working

Our just received results on the deformation microstructures evolved in a mediumMn austenitic steel during large strain warm to hot rolling were analyzed with a reference to other alloys with face centred cubic lattices and relatively low stacking fault energies. The structural changes were characterized by the development of dynamic recovery (DRV) and dynamic recrystallization (DRX). The deformation grain size decreased while the dislocation density increased with a decrease in deformation temperatur

Effect of long-term creep on microstructure of a 9% Cr heat resistant steel

The effect of long-term creep at 600°C under 137 MPa on the microstructure of a P92- type steel was investigated. The microstructure after tempering consisted of laths with an average thickness of 400 nm. Dispersion of secondary phases consists of M₂₃C₆ carbides with an average size of 85 nm located mainly on lath, block and prior austenite boundaries and MX carbonitrides with average size of 31 nm homogeniously distributed throughou

Effect of rolling temperature on microstructure and mechanical properties of 18%Mn TWIP/TRIP steels

The microstructure and mechanical properties of Fe-18Mn-0.6C and Fe-18Mn-0.4C steels subjected to rolling with a total reduction of 60% at temperatures of 773 K to 1373 K were investigate

Origin of threshold stresses in a P92-type steel

The creep behavior of a P92-type steel was examined at 923 K. The threshold shear stress of 51 MPa was revealed by an analysis of steady state creep behavior at applied stress ranging from 118 to 200 MP

Effect of warm to hot rolling on microstructure, texture and mechanical properties of an advanced medium-Mn Steel

The deformation microstructures and mechanical properties were studied in a medium-Mn austenitic steel subjected to warm-to-hot rollin

Deformation behavior of high-mn TWIP steels processed by warm-to-hot working

The deformation behavior of 18%Mn TWIP steels (upon tensile tests) subjected to warm-to-hot rolling was analyzed in terms of Ludwigson-type relationship, i.e., a = K\ e”1 + exp(K - ”2 e). Parameters of Ki and ” depend on material and processing conditions and can be expressed by unique functions of inverse temperatur