Dynamic recrystallization behavior of commercial pure aluminum
(1.湖南省长沙市中南大学材料科学与工程学院2.湖南省长沙市中南大学有色金属材料科学与工程教育部重点实验室3.湖南省长沙市湖南大学材料科学与工程学院4.中南大学 材料科学与工程学院, 长沙 410083)
Abstract: The flow stress feature and microstructure evolvement of a commercial pure aluminum were investigated by compression on Gleeble-1500 dynamic materials test machine. Optical microscopy (OM) and transmission electron microscopy (TEM) were applied to analyze the deformation microstructure of the commercial pure aluminum.The results show that the flow stress tends to be constant after a peak value and the dynamic recovery occurs when the deformation temperatures is 220 ℃ with the strain rate of 0.01 s？1; while the dynamic recrystallization occurs when the deformation temperature is higher than 380 ℃, and the flow stress exhibits a single peak at 460 ℃ with different strain rates from 0.001 s？1 to 1 s？1, and continuous dynamic recrystallization and geometric dynamic recrystallization occur during the hot compression of the commercial pure aluminum.
Key words: commercial pure aluminum; hot compression; dynamic recovery; dynamic recrystallization