Microstructural evolution in Al–Zn–Mg–Cu–Sc–Zr alloys during short-time homogenization
来源期刊：International Journal of Minerals Metallurgy and Materials2015年第5期
论文作者：Tao Liu Chun-nian He Gen Li Xin Meng Chun-sheng Shi Nai-qin Zhao
文章页码：516 - 523
摘 要：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 Mg Zn2 is completely dissolved into the matrix during a short homogenization treatment（470°C, 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.
Tao Liu1,2，Chun-nian He1,2，Gen Li1,2，Xin Meng1,2，Chun-sheng Shi1,2，Nai-qin Zhao1,2
1. Department of Materials Science and Engineering, Tianjin University
摘 要：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 Mg Zn2 is completely dissolved into the matrix during a short homogenization treatment（470°C, 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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