STUDY ON THE HOT DEFORMATION BEHAVIORS OF Al-Zn-Mg-Cu-Cr ALUMINUM ALLOY
来源期刊：Acta Metallurgica Sinica2008年第2期
论文作者：G.Y. Lin H. Zhang Z.F. Zhang J. Zhou D.S. Peng
Key words：Al-Zn-Mg-Cu-Cr aluminum alloy; Hot deformation; True stress vs true strain curve; Microstructure;
Abstract: The hot deformation behaviors and mierostructures of Al-Zn-Mg-Cu-Cr aluminum alloy have been studied using thermal simulation test, optical microscopy and transmission electron microscopy. As a result, the true stress versus true strain curves and the microstructures under various deformation conditions are obtained. The microstructures gradually incline to dynamic-recrystallization with the deformation temperature rising and the recrystallization grains refine with the decrease of deformation temperature or with raising the strain rates. The quantitative relationship between the Zener-HoUomon parameter (Z) and average recrystallization grain size in the subsequent heat treatment is set up.
G.Y. Lin1，H. Zhang1，Z.F. Zhang1，J. Zhou1，D.S. Peng1
(1.School of Materials Science and Engineering, Central South University, Changsha 410083, China)
Abstract:The hot deformation behaviors and mierostructures of Al-Zn-Mg-Cu-Cr aluminum alloy have been studied using thermal simulation test, optical microscopy and transmission electron microscopy. As a result, the true stress versus true strain curves and the microstructures under various deformation conditions are obtained. The microstructures gradually incline to dynamic-recrystallization with the deformation temperature rising and the recrystallization grains refine with the decrease of deformation temperature or with raising the strain rates. The quantitative relationship between the Zener-HoUomon parameter (Z) and average recrystallization grain size in the subsequent heat treatment is set up.
Key words:Al-Zn-Mg-Cu-Cr aluminum alloy; Hot deformation; True stress vs true strain curve; Microstructure;
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