2012•Journal of Xi'an University of TechnologyRequires access
The Effect of the Heat Treatment on the Microstructure of AZ80 Magnesium Alloy
Bailing Jiang
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Abstract
The effects of solution-aging and annealing treatment on microstructure of AZ80 magnesium alloy are investigated by means of optical microscopy,scanning electron microscopy and X-ray diffraction.The results show that the single supersaturated solid solution can be obtained after solution treatment,and that the β-Mg17Al12 phase is separated out from α-Mg matrix with discontinuous and continuous precipitations in the subsequent aging treatment.During the slow cooling process of annealing treatment,the lamellar β-Mg17Al12 phase is precipitated from α-Mg matrix.The lamellar β-Mg17Al12 phase can be transformed into nodular β-Mg17Al12 phase by dissolving themselves in the following spheroidizing treatment.Then,the small,uniform and nodular β-Mg17Al12 phase can be obtained.