当量法测定7XXX系铝合金热物理性能  

Determination of Thermo-physical Properties of 7XXX Aluminum Alloys by Equivalency Method

作　　者：黄元春 赵建业[1] 胡嘉伟 肖政兵 黄仕塔 Huang Yuanchun;Zhao Jianye;Hu Jiawei;Xiao Zhengbing;Huang Shita(Light Alloy Research Institute,Central South University,Changsha 410012,China;State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083,China;Department of Materials,Antai New Energy Technology Co.,Ltd,Zhangzhou 363999,China)

机构地区：[1]中南大学轻合金研究院,湖南长沙410012 [2]中南大学高性能复杂制造国家重点实验室,湖南长沙410083 [3]安泰新能源科技公司材料部,福建漳州363999

出　　处：《稀有金属材料与工程》2022年第7期2454-2459,共6页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China (52001332);Science Foundation of Hunan Province,China (2020JJ5752)。

摘　　要：基于当量的概念(所有合金元素对材料热物理性能的影响可以通过一个参考元素的等效作用来表示),以Zn为参考元素,通过对7XXX系铝合金二元相图富Al端液相线的数值拟合,得到当量算法所需参数,并将其他元素的当量浓度和参考元素的实际浓度之和用于计算材料的液相线温度和潜热。计算结果与差示扫描量热仪(DSC)测得的数据吻合。与Jmatpro软件获得的数值相比,该算法展现出更好的准确性。Based on the equivalency method(the impact of all alloying elements on the thermo-physical properties can be expressed through the equivalent impact of a reference element), Zn was regarded as a reference element, and the parameters required for equivalency calculation were obtained through the numerical fitting of the Al-rich liquidus line in the binary phase diagram of 7XXX series aluminum alloys. The sum of the equivalent concentration of other elements and the actual concentration of the reference element was used to calculate the liquidus temperature and latent heat of materials. The calculation results are in good agreement with the measured data by differential scanning calorimetric(DSC) apparatus. Compared with Jmatpro software, the equivalency method shows better accuracy.

关 键 词：7XXX铝合金 Zn当量 热物理性能 DSC Jmatpro 

分 类 号：TG146.21[一般工业技术—材料科学与工程]