JZUS - Journal of Zhejiang University SCIENCE

Journal of Zhejiang University SCIENCE A 2010 Vol.11 No.10 P.744-755

On the role of the constitutive model and basal texture on the mechanical behaviour of magnesium alloy AZ31B sheet

Author(s): H. Wang, P. D. Wu, K. W. Neale
Affiliation(s): Department of Mechanical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada, Faculty of Engineering, University of Sherbrooke, Sherbrooke, Quebec J1K 2R1, Canada
Corresponding email(s): peidong@mcmaster.ca
Key Words: Magnesium alloys, Crystal plasticity, Twinning, Texture

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Abstract: The recently developed elastic-viscoplastic self-consistent model with various self-consistent schemes was applied to study the effect of basal texture on the mechanical behavior of magnesium alloy AZ31B sheet. The influence of the basal texture was investigated using various initial textures generated by artificially tilting the measured texture of the reference AZ31B sheet around in a transverse direction. The material parameters for the various models were fitted to experimental uniaxial tension and compression along the rolling direction and were then used to study the effects of the basal texture on the yield stress, R value, ultimate stress and uniform strain under uniaxial tension. The effect of the basal texture on sheet metal forming was further assessed by calculating the limit strain under in-plane plane strain tension. An assessment of the predictive capability of polycrystal plasticity models was made based on comparisons of predictions and experimental observations. Among the available self-consistent approaches, the Affine self-consistent scheme resulted in the best overall performance.

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