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

• Published in: Steel research international 2011-02, Vol.82 (2), p.119-126
• Main Authors: Barrales-Mora, L.A., Lü, Y., Molodov, D.A.
• Format: Article
• Language: English
• Subjects: Annealing; Nucleation; Recrystallization; SFE; Simulation; Slip bands; Surface layer; Texture; TRIP steels; TWIP steels
• ISSN: 1611-3683; 1869-344X; 1869-344X
• DOI: 10.1002/srin.201000261

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.