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《中国有色金属学报(英文版)》 2015-01
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Microstructure and texture evolution of AZ31 magnesium alloy during large strain hot rolling

Fei GUO;Ding-fei ZHANG;Xu-sheng YANG;Lu-yao JIANG;Fu-sheng PAN;College of Materials Science and Engineering, Chongqing University;National Engineering Research Center for Magnesium Alloys, Chongqing University;  
Commercial AZ31 magnesium alloy sheets were rolled by nearly 70% thickness reduction in one rolling pass at 823 K. The results show that ultrafine grains are distributed in both shear bands and surfaces of the rolled sheets. The grain size of the refined grain in the shear bands is 0.4-1 μm. The outstanding grain refinement is attained by dynamic recrystallization due to flow localization. The texture in middle layer of the sheet is basal texture with little change in intensity throughout the rolling process, while the texture on surface becomes a double-peak texture with basal poles splitting in the transverse direction(TD). The relative intensity of the double-peak texture is 26.6, which is quite higher than that of the texture in the middle layer. The inhomogeneous strain distribution is responsible for the exceptional grain refinement and texture evolution.
【Fund】: Project(2013CB6322000)supported by the National Basic Research Program of China;; Project(2010DFR50010)supported by the International Scientific and Technological Cooperation Program of Ministry of Science and Technology of China;; Project(CSCT2013jcyj C60001)supported by Chongqing Science and Technology Commission China;; Project supported by the Sharing Fund of Chongqing University’s Large-scale Equipment China
【CateGory Index】: TG146.22;TG339
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