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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
Journal of Magnesium and Alloys ( IF 15.8 ) Pub Date : 2021-09-05 , DOI: 10.1016/j.jma.2021.07.023
Xianyun Zhu 1, 2 , Yuqian Wang 2 , Luiz Carneiro 2 , Huamiao Wang 3 , Yanyao Jiang 2
Affiliation  

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.



中文翻译:

沿五种不同材料取向和自由端扭转的单调加载下轧制 AZ31B 镁合金的弹性粘塑性自洽模型评估

综合实验,包括从轧制 AZ31B Mg 厚板沿五个不同材料取向(相对于轧制方向(RD))截取的试样的单调拉伸和单调压缩,以及沿厚度方向(ND)加工的管状试样的自由端扭转进行了。实验结果用于评估考虑了镁 (Mg) 合金孪晶和去孪生 (EVPSC-TDT) 的弹性粘塑性自洽模型。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 种加载情况断裂后的纹理,以及随着 ND 中张力的应变增加、RD 中的压缩、和沿 ND 的扭转。Swift 效应在实验中被观察到,并被模型正确模拟。

更新日期:2021-09-05
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