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Modeling of the dynamic recrystallization behavior of Csf/AZ91D magnesium matrix composites during hot compression process

机译：Csf / AZ91D镁基复合材料热压缩过程中动态再结晶行为的建模

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摘要

The deformation and microstructure evolution behavior of 15 vol% short carbon fiber reinforced AZ91D composites (C-sf/AZ91D) were investigated by hot compression test. An obvious dynamic recrystallization (DRX) was found in the matrix alloy, and the recrystallized grains around the fibers were finer than those in the alloy. The average grain size and volume fraction of the recrystallized grain increases with the increase of deformation temperature or the decrease of strain rate. The volume fraction of the recrystallized grain increases with increasing strain in a rapideslow manner. By regression analysis on these results, a constitutive model was developed for the first time in attempt to quantitatively evaluate the effect of temperature, strain and strain rate on the DRX behaviors. The calculated average grain size and volume fraction of the recrystallized grains are in good agreement with the experimental ones, thereby validating the accuracy of the developed model. (C) 2017 Elsevier B.V. All rights reserved.
机译：通过热压缩试验研究了15vol％短碳纤维增强AZ91D复合材料（C-sf / AZ91D）的变形和微观组织演变行为。在基体合金中发现了明显的动态再结晶（DRX），并且纤维周围的再结晶晶粒比合金中的晶粒细。再结晶晶粒的平均晶粒尺寸和体积分数随着变形温度的升高或应变速率的降低而增加。随着应变的增加，再结晶晶粒的体积分数迅速而缓慢地增加。通过对这些结果进行回归分析，首次建立了本构模型，试图定量评估温度，应变和应变速率对DRX行为的影响。计算出的再结晶晶粒的平均晶粒尺寸和体积分数与实验结果吻合良好，从而验证了所开发模型的准确性。 （C）2017 Elsevier B.V.保留所有权利。

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