在各种成型条件下使用多种建模方法对Al-Mg-Si合金的变形行为进行构成性分析
Bandar Alzahrani1, Ali Abd El-Aty1, Yong Xu2,3
1Department of Mechanical Engineering, College of Engineering at Al Kharj, Prince Sattam Bin Abdulaziz University, Al Kharj 11942, Saudi Arabia.
Materials (Basel, Switzerland)
|March 13, 2025
概括
了解Al-Mg-Si合金的热流行为至关重要. 晶体可塑性 (CP) 建模和S2-MJC模型通过考虑微观结构和变形条件来准确预测流应力.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 计算建模 计算建模
背景情况:
- Al-Mg-Si合金的热流行为很复杂,受到应变 (ε),应变速率 (ε ̇) 和温度 (T) 的影响.
- 在各种变形条件下准确预测这些行为对于材料加工和应用至关重要.
研究的目的:
- 开发和评估Al-Mg-Si合金热变形行为的预测模型.
- 为了比较晶体可塑性 (CP) 建模的准确性,修改了Zerilli-Armstrong (MZA) 和两个约翰逊-库克 (JC) 模型.
主要方法:
- 开发了水晶可塑性 (CP) 建模,修改的泽里利-阿姆斯特朗 (MZA) 和两个约翰逊-库克 (JC) 模型.
- 模型预测与实验数据进行了比较,应变速率范围为10−3至1s−1,温度为400-550°C.
- 使用统计参数 (RMSE,AARE,R) 来评估模型可靠性.
主要成果:
- CP模型和S2-MJC模型与实验流应力有很强的一致性.
- 在MZA和S1-MJC模型中,与实验结果的一致性较小.
- CP建模的准确性归因于它能够将微观结构与变形变量 (ε, ε ̇, T) 结合起来.
结论:
- CP建模和S2-MJC模型可靠地预测Al-Mg-Si合金的热变形行为.
- 这些模型有效地捕捉了影响流量压力的复杂相互作用,包括动态恢复和软化机制.
- 这项研究强调了微观结构敏感模型对于准确的材料行为预测的重要性.
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