Phase Equilibria, Thermodynamics and Related Studies of Multi-Component Alloy Systems

多组分合金体系的相平衡、热力学及相关研究

• 批准号: 9115356
• 负责人: Y. Austin Chang
• 金额: $ 31.14万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-03-15 至 1995-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9115356&HistoricalAwards=false
• 关键词: Phase; Equilibria; Thermodynamics; Related; Studies

This proposal examines three ternary aluminum alloys and one quartenary aluminum alloy system. Thermodynamic modeling and phase diagram calculations are coupled to solidification modeling to determine paths of solidification. Alloys of interest to the study are aluminum-rich alloys of Al-Mg-Cu, Al-Mg-Zn, Al-Zn-Cu, and Al- Mg-Zn-Cu. The approach combines thermodynamic modeling and experimental measurements of phase equilibria. A modified Schiel model is employed that accounts for back diffusion in determining the solidification path. Results from directional solidification experiments are compared with the calculations to improve the models. %%% A knowledge of the thermodynamics and phase equilibria of multi- component alloys is vital to the development of new alloys. This research expands basic understanding in this field for model aluminum alloys systems that also have commercial significance.

本提案考察了三种三元铝合金和一种四元铝合金体系。热力学建模和相图计算与凝固建模相结合，以确定凝固路径。感兴趣的合金是富铝的Al-Mg-Cu、Al-Mg-Zn、Al-Zn-Cu和Al-Mg-Zn-Cu合金。该方法将热力学建模和相平衡实验测量相结合。在确定凝固路径时，采用了考虑反向扩散的修正的Schiel模型。将定向凝固实验结果与改进模型的计算结果进行了比较。%了解多元合金的热力学和相平衡对于开发新的合金是至关重要的。本研究为具有商业意义的模型铝合金系统拓展了在该领域的基本认识。