Experimental Determination and Simulation of Annealing Textures in Cold Rolled TWIP and TRIP Steels

Abstract

The annealing textures of a Fe-0.3%C-22%Mn TRIP steel and a Fe-0.6%C-22%Mn TWIP steel were experimentally determined. The results showed that these alloys have an almost identical texture after recrystallization. In general, the recrystallization textures showed low intensities and a dependency on annealing temperature. The samples annealed at high temperatures exhibited a random texture whereas samples annealed at lower temperature showed at least a weak texture. Due to the low SFE of the metals, we surmise that the nucleation at shear bands contributed to the randomization of the recrystallization texture. It was found that grains with Q orientation grow in volume by a factor of 30 compared to deformed state. A 3D cellular automaton was utilized for the simulation of recrystallization in order to study the impact of different nucleation mechanisms on annealing texture. The simulations showed that at least 70% of nucleation has to occur at shear bands to account for the observed randomization of the texture. In order to reproduce the weak texture of samples annealed at lower temperatures, 30% of the nuclei at shear bands needed to be either Q or Goss oriented. A more detailed analysis is necessary to also reproduce the minor texture components.

Effect of starting grain size on the evolution of microstructure and texture during thermo-mechanical processing of CoCrFeMnNi high entropy alloy

“…The previous studies on the recrystallization texture of low SFE materials, such as brass, shows the presence of the brass recrystallization texture component (BR) {236}<385>. In contrast, low SFE twinning induced plasticity (TWIP) steels show retention of deformation texture components [40,41], weak or completely random texture after cold-rolling and annealing [42,43] instead of a strong BR component. annealing, over a wide grain size range .…”

Effect of cold-rolling strain on the evolution of annealing texture of equiatomic CoCrFeMnNi high entropy alloy

“…show retention of deformation texture components [35,36], weak or rather random texture after cold-rolling and annealing [37,38].…”

Assessment of bias errors caused by texture and sampling methods in diffraction-based steel phase measurements

“…3 were calculated via pole figure inversion using the software package MTEX (Hielscher & Schaeben, 2008; Bachmann et al, 2010) with complete pole figures measured at the NIST Center for Neutron Research, beamline BT-8 (Brand et al, 1997). These TRIP materials have been analyzed previously (Gnäupel-Herold & Creuziger, 2011) and are similar to other AHSS for which ODFs can be found in the literature (De Knijf et al, 2014; de Meyer et al, 2001; Barrales-Mora et al, 2011). To characterize the sharpness of the ODF, texture index (Morawiec, 2004) values were used.…”