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首页> 外文会议>International Conference on Extrusion and Benchmark >Simulation of the Grain Structure Evolution of a Mg-Al-Ca-Based Alloy during Hot Extrusion Using the Cellular Automation Method
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Simulation of the Grain Structure Evolution of a Mg-Al-Ca-Based Alloy during Hot Extrusion Using the Cellular Automation Method

机译：使用蜂窝自动化方法在热挤出过程中模拟Mg-Al-Ca基合金的晶粒结构演化

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In the present study, the evolution of the grain structure of a Mg-Al-Ca-based alloy during hot extrusion was simulated with the cellular automation method. The Laasraoui-Jonas microstructure model was used to describe the dislocation evolution inside crystallites during dynamic recrystallization. The parameters in the Laasraoui-Jonas model, such as the hardening parameter, recovery parameter and material constants, were determined from the flow stress-strain data obtained from hot compression tests using a Gleeble-1500 thermomechanical simulator. The extrusion process was simulated using a DEFORM 3D FEM code. The influence of ram speed on grain structure evolution was analyzed. It was found that the average grain size increases with increasing ram speed. Good agreements between the predicted and observed grain structures were achieved.
机译：在本研究中，用细胞自动化方法模拟了热挤出过程中Mg-Al-Ca基合金的晶粒结构的演变。 Laasraoui-Jonas微观结构模型用于描述在动态再结晶期间微晶内的位错进化。从使用Gleyble-1500热机械模拟器从热压缩测试获得的流应力 - 应变数据确定LaASraoui-Jonas模型中的参数，例如硬化参数，恢复参数和材料常数。使用变形3D FEM代码模拟挤出过程。分析了RAM速度对晶粒结构进化的影响。发现平均晶粒尺寸随着RAM速度的增加而增加。达到了预测和观察到的晶粒结构之间的良好协议。

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