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- W4309765555 abstract "Although the {10-12} twinning behavior of Mg alloys under uniaxial tension and compression has been extensively investigated, the simulations of {10-12} twinning behavior under biaxial tension have rarely been reported. In this work, the EVPSC-TDT model is first employed to systematically investigate the deformation behavior of a Mg alloy AZ31 plate under biaxial tension in the RD-TD and ND-TD planes. The RD, TD and ND refer to the rolling direction, transverse direction, and normal direction of the hot rolled plate. The measured stress-strain curves and texture evolutions are well predicted and the contours of plastic work under biaxial tension are also constructed for comparison with experiments. The plastic response has been interpreted in terms of relative activities of various deformation modes. For biaxial tension in the RD-TD plane, basal and pyramidal slips mainly contribute to the plastic deformation for stress ratios of σRD:σTD= 1:2 to 2:1. Prismatic slip becomes more active for σRD:σTD=1:4 and 4:1. Compression twinning could be activated and so cause texture reorientation at large strains, especially for σRD:σTD=1:1. The six-fold feature of {10-10} pole figure could still be observed forσRD:σTD=1:4 and 4:1 at large strain. For biaxial tension in the ND-TD plane, tensile twinning plays an important role for σND:σTD≥1:2, while prismatic slip contributes to plastic deformation for the other cases. With the increase of stress ratio from σND:σTD≥1:1 to 1:0, the predicted twin volume fractions (VFs) at a specific strain along the ND, εND, almost linearly decrease, however, it is seen that the experimental ones at given strains along the ND do not follow such a trend with the measured twin VFs within the range of stress ratios, 2:1≤σND:σTD≤6:1, clearly being overestimated, and the difference between experiments and simulations becomes most obvious at the relatively small strain of εND=0.015. The possible reasons for the observed difference are discussed." @default.
- W4309765555 created "2022-11-29" @default.
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- W4309765555 date "2023-05-01" @default.
- W4309765555 modified "2023-10-16" @default.
- W4309765555 title "On the modeling of deformation mechanisms in a Mg-3Al-1Zn alloy under biaxial tension" @default.
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- W4309765555 doi "https://doi.org/10.1016/j.jmst.2022.09.051" @default.
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