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Composition optimization of Al-Zn-Mg-Cu alloy via thermodynamic calculation

Y. LIU1, D. M. JIANG1, W. J. LI1


  1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China


Phase fraction and solidification path of Al-Zn-Mg-Cu series aluminum alloy were calculated by thermodynamic calculation software Jmat-Pro.The variation of MgZn2 and A12CuMg phases and crystallization temperatures with Zn, Mg and Cu contents were studied in details. The thermodynamic calculation results indicated that, in the mass fraction ranges of Zn of 6.2-6.6%,Mg of 2.3%-2.5%,Cu of 1.9-2.1%,the content of MgZn2 phase can be up to more than 4.5% and that of Al2CuMg phase can be lower than 0.6% during the composition optimization of 7050 alloy..


A1-Zn-Mg-Cu alloy, Thermodynamic calculation, Composition optimization.

Submitted at: July 13, 2015
Accepted at: Sept. 29, 2016


Y. LIU, D. M. JIANG, W. J. LI, Composition optimization of Al-Zn-Mg-Cu alloy via thermodynamic calculation, Journal of Optoelectronics and Advanced Materials Vol. 18, Iss. 9-10, pp. 868-872 (2016)