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首页> 外文会议>International Conference on Recrystallization and Grain Growth(ReX amp; GG III); 20070610-15; Jeju Island(KR) >Implementation of Twin Reorientation and Softening Schemes in a Polycrystal Plasticity Model for Mg Alloys
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Implementation of Twin Reorientation and Softening Schemes in a Polycrystal Plasticity Model for Mg Alloys

机译：镁合金多晶塑性模型中双取向和软化方案的实现

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Uniaxial compression tests on hot-rolled AZ31 Mg alloy were carried out at a temperature of 300℃. In order to investigate work hardening and texture evolution during plastic deformation, cylindrical specimens were compressed to the rolling direction. Experimental investigation reveals that flow curves are strongly dependent on micro structure evolution such as deformation twinning and softening phenomenon. The occurrence of deformation twinning and softening phenomenon was revealed by the observation of microtexture using electron backscatter diffraction (EBSD). A visco-plastic self-consistent (VPSC) polycrystal model was used to simulate the work hardening, softening and texture evolution during the uniaxial compression. In order to calculate orientation of deformation twins, predominant twin reorientation (PTR) scheme was implemented into the polycrystal model. A softening scheme was also implemented in the polycrystal model to predict softening phenomenon and texture evolution after a peak stress.
机译：在300℃的温度下对热轧AZ31 Mg合金进行了单轴压缩试验。为了研究塑性变形过程中的加工硬化和组织演变，将圆柱状试样沿轧制方向压缩。实验研究表明，流动曲线在很大程度上取决于微观结构的演化，例如变形孪生和软化现象。通过使用电子背散射衍射（EBSD）观察微观纹理，揭示了变形孪生和软化现象的发生。使用粘塑性自洽（VPSC）多晶模型模拟单轴压缩过程中的加工硬化，软化和织构演变。为了计算变形孪晶的取向，在多晶模型中采用了主要的孪生重取向（PTR）方案。在多晶模型中还实施了软化方案，以预测峰值应力后的软化现象和纹理演变。

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