Tao Liu, Chun-nian He, Gen Li, Xin Meng, Chun-sheng Shi, and Nai-qin Zhao, Microstructural evolution in Al-Zn-Mg-Cu-Sc-Zr alloys during short-time homogenization, Int. J. Miner. Metall. Mater., 22(2015), No. 5, pp. 516-523. https://doi.org/10.1007/s12613-015-1101-3
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Tao Liu, Chun-nian He, Gen Li, Xin Meng, Chun-sheng Shi, and Nai-qin Zhao, Microstructural evolution in Al-Zn-Mg-Cu-Sc-Zr alloys during short-time homogenization, Int. J. Miner. Metall. Mater., 22(2015), No. 5, pp. 516-523. https://doi.org/10.1007/s12613-015-1101-3
Tao Liu, Chun-nian He, Gen Li, Xin Meng, Chun-sheng Shi, and Nai-qin Zhao, Microstructural evolution in Al-Zn-Mg-Cu-Sc-Zr alloys during short-time homogenization, Int. J. Miner. Metall. Mater., 22(2015), No. 5, pp. 516-523. https://doi.org/10.1007/s12613-015-1101-3
Citation:
Tao Liu, Chun-nian He, Gen Li, Xin Meng, Chun-sheng Shi, and Nai-qin Zhao, Microstructural evolution in Al-Zn-Mg-Cu-Sc-Zr alloys during short-time homogenization, Int. J. Miner. Metall. Mater., 22(2015), No. 5, pp. 516-523. https://doi.org/10.1007/s12613-015-1101-3
Department of Materials Science and Engineering, Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300072, China
Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
Microstructural evolution in a new kind of aluminum (Al) alloy with the chemical composition of Al-8.82Zn-2.08Mg-0.80Cu-0.31Sc-0.3Zr was investigated. It is found that the secondary phase MgZn2 is completely dissolved into the matrix during a short homogenization treatment (470℃, 1 h), while the primary phase Al3(Sc,Zr) remains stable. This is due to Sc and Zr additions into the Al alloy, high Zn/Mg mass ratio, and low Cu content. The experimental findings fit well with the results calculated by the homogenization diffusion kinetics equation. The alloy shows an excellent mechanical performance after the short homogenization process followed by hot-extrusion and T6 treatment. Consequently, a good combination of low energy consumption and favorable mechanical properties is obtained.
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