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首页> 外文期刊>Mathematical Problems in Engineering >Recrystallization Microstructure Prediction of a Hot-Rolled AZ31 Magnesium Alloy Sheet by Using the Cellular Automata Method
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Recrystallization Microstructure Prediction of a Hot-Rolled AZ31 Magnesium Alloy Sheet by Using the Cellular Automata Method

机译：通过使用蜂窝自动机方法重结晶热轧AZ31镁合金板的微观结构预测

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摘要

A large reduction rolling process was used to obtain complete dynamic recrystallization (DRX) microstructures with fine recrystallization grains. Based on the hyperbolic sinusoidal equation that included an Arrhenius term, a constitutive model of flow stress was established for the unidirectional solidification sheet of AZ31 magnesium alloy. Furthermore, discretized by the cellular automata (CA) method, a real-time nucleation equation coupled flow stress was developed for the numerical simulation of the microstructural evolution during DRX. The stress and strain results of finite element analysis were inducted to CA simulation to bridge the macroscopic rolling process analysis with the microscopic DRX activities. Considering that the nucleation of recrystallization may occur at the grain and R-grain boundary, the DRX processes under different deformation conditions were simulated. The evolution of microstructure, percentages of DRX, and sizes of recrystallization grains were discussed in detail. Results of DRX simulation were compared with those from electron backscatter diffraction analysis, and the simulated microstructure was in good agreement with the actual pattern obtained using experiment analysis. The simulation technique provides a flexible way for predicting the morphological variations of DRX microstructure accompanied with plastic deformation on a hot-rolled sheet.
机译：使用大的减少轧制工艺来获得具有细重结晶晶粒的完全动态再结晶（DRX）微结构。基于包括Arrhenius术语的双曲线正弦方程，为AZ31镁合金的单向凝固片建立了一种流量应力的结构型模型。此外，通过蜂窝自动机（CA）方法离散化，开发了一种实时成核方程耦合流量，用于DRX期间微结构演化的数值模拟。有限元分析的应力和应变结果在CA仿真中引导，用微观DRX活动桥接宏观轧制过程分析。考虑到重结晶的成核可能发生在晶粒和R晶界处，模拟不同变形条件下的DRX过程。详细讨论了微观结构，DRX百分比和重结晶颗粒的尺寸的演变。将DRX仿真的结果与电子反散射衍射分析的结果进行了比较，并且模拟微观结构与使用实验分析获得的实际模式吻合良好。仿真技术提供了一种灵活的方法，用于预测热轧板上塑性变形的DRX微观结构的形态变化。

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  • 来源
    《Mathematical Problems in Engineering》 |2019年第19期|1484098.1-1484098.15|共15页
  • 作者

    Chen Ming; Hu Xiaodong; Zhao Hongyang; Ju Dongying;

  • 作者单位

    Univ Sci & Technol Liaoning Sch Mech Engn & Automat Anshan 114051 Liaoning Peoples R China|Univ Sci & Technol Liaoning Res Ctr Roll Casting Technol Magnesium Alloys Anshan 114051 Liaoning Peoples R China;

    Univ Sci & Technol Liaoning Res Ctr Roll Casting Technol Magnesium Alloys Anshan 114051 Liaoning Peoples R China;

    Univ Sci & Technol Liaoning Res Ctr Roll Casting Technol Magnesium Alloys Anshan 114051 Liaoning Peoples R China;

    Univ Sci & Technol Liaoning Res Ctr Roll Casting Technol Magnesium Alloys Anshan 114051 Liaoning Peoples R China|Saitama Inst Technol Dept Mat Sci & Engn Fusaiji 1690 Saitama 3690293 Japan;

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