上海交通大学学报（英文版） ›› 2012, Vol. 17 ›› Issue (3): 286-290.doi: 10.1007/s12204-012-1270-4

• 论文 • 上一篇    下一篇

Thermodynamic Analyse on Equilibrium Precipitation Phases and Composition Design of Al-Zn-Mg-Cu Alloys

YU Jing-jing (于晶晶), LI Xiao-mei (李晓梅), YU Xin-quan (余新泉)   

  1. (School of Materials Science and Engineering, Southeast University, Nanjing 211189, China)
  • 出版日期:2012-06-30 发布日期:2012-11-15
  • 通讯作者: YU Jing-jing (于晶晶) E-mail:yjjseu@gmail.com

Thermodynamic Analyse on Equilibrium Precipitation Phases and Composition Design of Al-Zn-Mg-Cu Alloys

YU Jing-jing (于晶晶), LI Xiao-mei (李晓梅), YU Xin-quan (余新泉)   

  1. (School of Materials Science and Engineering, Southeast University, Nanjing 211189, China)
  • Online:2012-06-30 Published:2012-11-15
  • Contact: YU Jing-jing (于晶晶) E-mail:yjjseu@gmail.com

摘要： The solidification paths of Al-Zn-Mg-Cu alloys and its precipitation behavior are analyzed using software package JMatPro 6.0 for material property simulation of Al-base alloys. The microstructures of the experimental alloys are analyzed; the experimental results of microstructural analysis are in agreement with the thermodynamic prediction. Through orthogonal experimental method, this paper designs the composition of Al-Zn-Mg-Cu alloys by studying the variation of η (MgZn2) phase, S (Al2CuMg) phase, T (AlZnMgCu) phase amount and precipitation temperatures with different Zn, Mg and Cu contents. It is found that with the optimum mass fraction of Zn of 6.7%, Mg of 2.2%—2.5% and Cu of 1.6%—2.0%, the mass fraction of η phase can be up to 8.7%—9.22% and that of S phase and T phase can be lower than 0.5%.

关键词: Al-Zn-Mg-Cu alloys, thermodynamic calculation, composition design

Abstract: The solidification paths of Al-Zn-Mg-Cu alloys and its precipitation behavior are analyzed using software package JMatPro 6.0 for material property simulation of Al-base alloys. The microstructures of the experimental alloys are analyzed; the experimental results of microstructural analysis are in agreement with the thermodynamic prediction. Through orthogonal experimental method, this paper designs the composition of Al-Zn-Mg-Cu alloys by studying the variation of η (MgZn2) phase, S (Al2CuMg) phase, T (AlZnMgCu) phase amount and precipitation temperatures with different Zn, Mg and Cu contents. It is found that with the optimum mass fraction of Zn of 6.7%, Mg of 2.2%—2.5% and Cu of 1.6%—2.0%, the mass fraction of η phase can be up to 8.7%—9.22% and that of S phase and T phase can be lower than 0.5%.

Key words: Al-Zn-Mg-Cu alloys, thermodynamic calculation, composition design

中图分类号: