Kinetics of recrystallization for twin-roll casting AZ31 magnesium alloy during homogenization |
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Authors: | Hu Zhao Pei-jie Li Liang-ju He |
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Affiliation: | National Center of Novel Materials for International Research, Tsinghua University, Beijing 100084, China |
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Abstract: | The kinetics of recrystallization for twin-roll casting AZ31 magnesium alloy with different thicknesses during homogenization was analyzed.It is shown that fine grains are first formed at the boundaries of deformed bands in the twin-roll casting slab.The recrystallized grains with no strain are gradually substituted for the deformed microstructure of twin-roll casting AZ31 magnesium alloy.The incubation temperature and time for the recrystallization of a twin-roll casting AZ31 magnesium alloy strip with a thickness of 3 mm are lower and shorter than those of the 6-mm thick strip,respectively.The 3-mm thick twin-roll casting magnesium alloy has finer grains than the 6-mm thick strip.The activation energies of recrystallization for twin-roll casting AZ31 magnesium alloy slabs with the thickness of 3 and 6 mm are 88 and 69 kJ/mol,respectively.The kinetics curves of recrystallization for twin-roll casting AZ31 magnesium alloy were obtained. |
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Keywords: | magnesium alloys twin-roll casting homogenization kinetics grain size |
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