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首页> 外文期刊>Materials Science and Technology: MST: A publication of the Institute of Metals >Mathematical model of deformation and microstructural evolution during hot rolling of aluminium alloy 5083
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Mathematical model of deformation and microstructural evolution during hot rolling of aluminium alloy 5083

机译：铝合金5083热轧变形和组织演变的数学模型

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摘要

A mathematical model to predict the through thickness temperature, strain and strain rate distributions during hot rolling and the subsequent microstructure evolution was developed using the commercial finite element package ABAQUS. Microstructure evolution predictions included the amount of recrystallisation through the thickness of the sheet based on its thermomechanical history during rolling and thermal history after rolling. The equations used to predict the microstructure evolution were based on semiempirical relationships found in the literature for a 5083 aluminium alloy. Validation of the model predictions was done using comprehensive experimental measurements which were conducted using the Corus research multimill, a pilot scale experimental rolling facility, in Ijmuiden, The Netherlands. The results indicate that the through thickness temperature and strain distribution predictions for the rolling operation are reasonable. Hence, the boundary conditions used in the finite element model adequately represent the interface heat transfer and friction conditions. Microstructure predictions using the literature based equations significantly underestimate the amount of recrystallisation occurring in the sheet. A sensitivity analysis indicates that the recrystallisation kinetics are extremely sensitive to the fitting parameters used in the microstructure equation, and that the gradient in the recrystallisation kinetics is the result of the temperature gradient experienced by the specimen during deformation.
机译：使用商业有限元软件包ABAQUS，建立了一个数学模型来预测热轧过程中的贯穿厚度温度，应变和应变率分布以及随后的组织演变。微观组织演变的预测包括基于薄板在轧制过程中的热机械史和轧制后的热史，通过薄板厚度的再结晶量。用于预测微观结构演变的方程是基于5083铝合金的文献中发现的半经验关系。模型预测的验证是使用综合实验测量来完成的，该实验是使用位于荷兰Ijmuiden的中试规模实验轧制设施Corus research multimill进行的。结果表明，轧制过程的贯穿厚度温度和应变分布预测是合理的。因此，在有限元模型中使用的边界条件足以代表界面传热和摩擦条件。使用基于文献的方程式进行的微结构预测大大低估了板材中发生的重结晶量。敏感性分析表明，再结晶动力学对微结构方程式中使用的拟合参数极为敏感，并且再结晶动力学中的梯度是试样在变形过程中经历的温度梯度的结果。

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