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Thermodynamic Analyse on Equilibrium Precipitation Phases and Composition Design of Al-Zn-Mg-Cu Alloys 被引量:6

Thermodynamic Analyse on Equilibrium Precipitation Phases and Composition Design of Al-Zn-Mg-Cu Alloys
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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%. 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 (A12CuMg) phase, T (A1ZnMgCu) 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%.
出处 《Journal of Shanghai Jiaotong university(Science)》 EI 2012年第3期286-290,共5页 上海交通大学学报(英文版)
关键词 Al-Zn-Mg-Cu alloys thermodynamic calculation composition design Al-Zn-Mg-Cu alloys, thermodynamic calculation, composition design
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