Evaluation of elastic-viscoplastic self-consistent models for a rolled AZ31B magnesium alloy under monotonic loading along five different material orientations and free-end torsion
Evaluation of elastic-viscoplastic self-consistent models for a rolled AZ31B magnesium alloy under monotonic loading along five different material orientations and free-end torsion
复制标题
DOI：
10.1016/j.jma.2021.07.023
复制
发表时间：
2021-09
影响因子：
17.6
通讯作者：
Xianyun Zhu;Yuqian Wang;Luiz Carneiro;Huamiao Wang;Yanyao Jiang
中科院分区：
文献类型：
--
作者：
Xianyun Zhu;Yuqian Wang;Luiz Carneiro;Huamiao Wang;Yanyao Jiang
对AZ 31 B镁合金厚板沿轧制方向（RD）沿着5种不同材料取向的单向拉伸和单向压缩试样，以及沿厚度方向（ND）沿着加工的管状试样进行了单向扭转试验。实验结果被用来评估一个弹粘塑性自洽模型考虑孪生和退孪生（EVPSC-TDT）的镁合金（Mg）。EVPSC-TDT模型提供的应力-应变曲线和硬化率与所有11种加载情况下的实验结果非常吻合。该模型充分预测了所有11种加载情况下断裂后的织构，以及拉伸孪晶随ND中拉伸应变、RD中压缩应变和ND中沿着扭转应变的变化。在实验中观察到Swift效应，并通过模型进行了适当的模拟。
Comprehensive experiments including monotonic tension and monotonic compression of specimens taken from a rolled AZ31B Mg thick plate along five different material orientations with respect to the rolled direction (RD), and free-end torsion of a tubular specimen machined along the thickness direction (ND) were conducted. The experimental results were used to evaluate an elastic-viscoplastic self-consistent model with the consideration of twinning and detwinning (EVPSC-TDT) on magnesium (Mg) alloys. The EVPSC-TDT model provides stress-strain curves and the hardening rates in close agreement with the experimental results of all the 11 loading cases. The model adequately predicts the textures after fracture of all the 11 loading cases and the evolutions of tension twins with increasing strains for tension in the ND, compression in the RD, and torsion along the ND. The Swift effect was observed in the experiment and was properly simulated by the model.