Comparison of three state-of-the-art crystal plasticity based deformation twinning models for magnesium alloys

Cheng, Jiahao; Bong, Hyuk Jong; Qiao, H.; Hu, Xiaohua; Sun, Xin; Ghosh, Somnath; Wu, Peidong

doi:10.1016/j.commatsci.2022.111480

Cited by 9 publications

(2 citation statements)

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“…The EVPSC-TDT model was applied to AZ31B plate, which is capable of interpreting the mechanical behavior of magnesium alloys [20][21][22][23][24][25][26][27][28][29][32][33][34]. The microstructure of the undeformed sample was measured and included in Figure 1a in terms of the {00.1} pole figure, which shows that the as-received AZ31 plate had extreme typical rolled texture [35,36].…”

Section: Parameter Calibrationmentioning

confidence: 99%

“…For instance, Wang et al [27,28] applied the EVPSC-TDT model in the simulation of the inelastic behavior of Mg alloy rolled sheets and accurately predicted the inelastic behavior of AZ31B rolled sheets during unloading. Cheng et al [29] compared three state-of-the-art crystal plasticity-based twinning models from the literature, namely the elastic visco-plastic self-consistent twinning-detwinning (EVPSC-TDT) model, crystal plasticity finite-element model based on an enhanced predominate twin reorientation approach (CPFE-ePTR), and the crystal plasticity finite-element model based on a "discrete twinning" approach (CPFE-DT), and they came to the conclusion that the EVPSC-TDT method showed the highest computational efficiency. Inelastic behavior became more pronounced when twinning was activated, and detwinning was identified as the dominant deformation mechanism during unloading in the case of compressing the extruded bars.…”

Section: Introductionmentioning

confidence: 99%

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Internal Elastic Strains of AZ31B Plate during Unloading at Twinning-Active Region

Zhou

Zhang

et al. 2023

Metals

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Magnesium alloys, being the lightest structural metals, have garnered significant attention in various fields. The characterization of inelastic behavior has been extensively investigated by researchers due to its impact on structural component performance. However, the occurrence of twinning in the absence of any applied driving force during unloading has lacked reasonable explanations. Moreover, the influence of deformation mechanisms other than twinning on inelastic behavior remains unclear. In this study, uniaxial tension and compression tests were conducted on hot-rolled magnesium alloy plates, and neutron diffraction experiments were employed to characterize the evolution of macroscopic mechanical response and microscopic mechanisms. Additionally, a twinning and detwinning (TDT) model based on the elastic visco-plastic self-consistent (EVPSC) model has been proposed, incorporating back stress to describe the deformation behavior during stress relaxation. This approach provides a comprehensive understanding of the inelastic behavior of magnesium alloys from multiple perspectives and captures the influence of microscale mechanisms. A thorough understanding of the inelastic behavior of magnesium alloys and a reasonable explanation for the occurrence of twinning under zero-stress conditions offer valuable insights for the precise design of magnesium alloy structures.

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