Microstructure and texture evolution of TRC A8006 alloy by homogenization
来源期刊：International Journal of Minerals Metallurgy and Materials2013年第5期
论文作者：Zhong-wei Chen Jing Zhao Xiao-lei Hao
文章页码：433 - 439
摘 要：The microstructure and texture evolution of twin-roll cast A8006 alloy by homogenization were characterized using scanning and transmission electron microscopy, and the microhardness was tested as well. According to the relationship between dendritic arm spacing and cooling rate the cooling rate of the as-cast twin-roll cast A8006 sheet of 6mm in thickness was estimated as 1.48×103K·s-1 . It is found that the grains and the nanostructural precipitates of the twin-roll cast sheet become coarser after homogenization at 580℃ for 4 h in comparison with those after homogenization at 500℃ for 8h. The textures formed after cold rolling and became weaker during homogenization. The increase in hardness of the as-cast twin-roll cast sheets is related to the supersaturated α-Al solid solution and fine microstructure, but the decrease in hardness after homogenization can be attributed to the coarsening of grains and Al6Fe（Mn） precipitates.
Zhong-wei Chen，Jing Zhao，Xiao-lei Hao
State Key Laboratory of Solidification Processing,Northwestern Polytechnical University
摘 要：The microstructure and texture evolution of twin-roll cast A8006 alloy by homogenization were characterized using scanning and transmission electron microscopy, and the microhardness was tested as well. According to the relationship between dendritic arm spacing and cooling rate the cooling rate of the as-cast twin-roll cast A8006 sheet of 6mm in thickness was estimated as 1.48×103K·s-1 . It is found that the grains and the nanostructural precipitates of the twin-roll cast sheet become coarser after homogenization at 580℃ for 4 h in comparison with those after homogenization at 500℃ for 8h. The textures formed after cold rolling and became weaker during homogenization. The increase in hardness of the as-cast twin-roll cast sheets is related to the supersaturated α-Al solid solution and fine microstructure, but the decrease in hardness after homogenization can be attributed to the coarsening of grains and Al6Fe（Mn） precipitates.
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