Study on Texture and Grain Orientation Evolution in Cold-Rolled BCC Steel by Reaction Stress Model

• Main Authors: Ning Zhang, Li Meng, Wenkang Zhang, Weimin Mao
• Format: Article
• Language: English
• Published: MDPI AG 2020-08-01
• Series: Crystals
• Subjects: BCC structure; reaction stress (RS) model; rolling; texture; orientation
• Online Access: https://www.mdpi.com/2073-4352/10/8/680

The evolution of texture and grain orientations in a cold-rolled steel of BCC structure was simulated by a reaction stress (RS) model. The results show that cold-rolled texture could be assessed based on a RS model because the stress and strain are considered to remain consistent in the deformation process. The strain consistency is actualized by the cooperation of two plastic strains and an elastic strain. The accumulation range of each reaction stress and different activation abilities of {110}<111> and {112}<111> slip systems strongly affect the calculated deformation textures. The values of reaction stress are influenced by elastic anisotropy; however, the effects are greatly reduced because its corresponding reaction stress accumulation is limited. Typical α-fiber and γ-fiber textures are achieved when the reaction stress accumulation coefficients <em>α_ijs</em> are chosen suitably. Furthermore, the <em>α_ij</em> values that are selected based on statistically calculated textures can also be used to simulate the orientation change of multiple orientations. The existence of reaction stress is able to stabilize crystallographically symmetrical orientations under rolling deformation, in which the Schmid factors of several slip systems are identical.