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晶体可塑性有限元模拟在合金滚动中谷物演变行为的模拟
Jun Li1,2, Xiaoyan Wu1, Haitao Jiang1
1National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing, University of Science and Technology Beijing, Beijing 100083, China.
Materials (Basel, Switzerland)
|August 10, 2024
概括
结晶可塑性有限元法 (FEM) 模拟显示了在冷过程中Al-Mg-Si合金中的异质应力和应变分布. 较小的颗粒大小降低了应变度,而纹理强度随着变形而增加.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 计算力学 计算力学 计算力学
背景情况:
- 了解多晶合金在变形过程中的机械行为对于优化制造工艺至关重要.
- 晶体可塑性有限元法 (FEM) 提供了一个强大的工具,用于研究微观结构对宏观材料反应的影响.
研究的目的:
- 研究滚动变形和滑动系统对Al-Mg-Si合金微观结构和机械性能的影响.
- 建立和验证一个晶体可塑性有限元方法模型,用于模拟冷工艺.
主要方法:
- 使用有限元法 (FEM) 合晶体可塑性模型来模拟冷.
- 分析应力和应变分布,谷物旋转和滑动系统活动.
- 使用电子反射衍射 (EBSD) 进行实验验证.
主要成果:
- 在应力和延展分布中观察到明显的异质性,在材料表面的最大值.
- 较小的粒度导致了粒度边界的应变度降低.
- 基于初始方向的粒度变形和旋转的显著差异.
- 确定了影响塑料变形的主导滑动系统: (11-1) <-110>, (111) <10-1>,和 (1-11) <011>.
- 增加了粒度方向度,纹理强度和材料强度,具有更高的滚动变形.
- 实验EBSD结果证实了严重的谷物扭曲和增加的纹理强度与大滚动减少.
结论:
- 开发的晶体可塑性FEM模型准确地预测了Al-Mg-Si合金在冷过程中的行为.
- 滚动变形显著影响微观结构,纹理和机械性能.
- 这些发现为控制合金的制过程,微观结构和性能提供了理论基础.
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