Modeling texture evolution during monotonic loading of Zn-Cu-Ti alloy sheet using the viscoplastic self-consistent polycrystal model

• Published in: Journal of alloys and compounds 2021-04, Vol.860, p.158425, Article 158425
• Main Authors: Roatta, A., Leonard, M., Nicoletti, E., Signorelli, J.W.
• Format: Article
• Language: English
• Subjects: Aluminum; Continuous dynamic recrystallization; Copper; Copper base alloys; Crystallography; Dynamic recrystallization; Evolution; Mechanical analysis; Metal sheets; Polycrystals; Rolling direction; Shear tests; Texture; Texture and anisotropy; VPSC model; Zinc; Zinc sheet
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2020.158425

•Continuous dynamic recrystallization affects texture evolution of Zn-Cu-Ti sheet.•CDRX effect on texture was mimicked by an empirical modification of the VPSC model.•Calibration of the model was done by fitting tensile tests along three directions.•The model was successfully validated by texture analysis and in-plane shear tests.•Basal-pole splitting predicted by standard VPSC for transverse loading was avoided. The aim of the present work is to simulate the macroscopic, anisotropic mechanical response and texture evolution of Zn-Cu-Ti alloy sheet under uniaxial tension and simple shear taking into account the grain fragmentation process due to continuous dynamic recrystallization (CDRX). The Visco-Plastic Self-Consistent (VPSC) model is applied using the affine linearization procedure, and the effect of CDRX on texture evolution is mimicked by empirically enforcing the continuity of the lattice rotation field between pairs of orientations randomly chosen. The proposed model is validated by tensile and shear tests at different loading directions; specimens were cut at 0°, 45°, and 90° with respect to the rolling direction. We show that the mechanical response and the texture evolution are adequately reproduced taking into account the effect of CDRX on the crystallographic orientations. In particular, the typical splitting of the basal poles predicted by VPSC simulations without the recrystallization effect when tensile loading is aligned to the transverse direction is avoided, in agreement with the experimental evidence. The proposed mechanics of short-range interaction can effectively mimic, in a very simple way, the effects of CDRX on the texture evolution of Zn-Cu-Ti alloy sheet under monotonic loadings.