Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1610190 | Journal of Alloys and Compounds | 2015 | 8 Pages |
Abstract
The microstructure and mechanical properties of AZ80 wrought magnesium alloys with varying Sn contents (0, 1, 2 and 4Â wt.%) have been studied by thermodynamic and precipitation kinetics calculation and examined using scanning electron microscopy (SEM), transmission electron microscopy (TEM), hardness test and uniaxial tensile test at room temperature in this paper. The results of thermodynamic and precipitation kinetics calculation showed that the precipitation sequences were determined by the content of Sn element. It was found that in the aging treatment of this work, Mg17Al12 phase precipitated sooner than Mg2Sn phase in the alloys with less than 1.72Â wt.% Sn and there was a contrary precipitation sequence of these two phases in the alloys with more than 1.72Â wt.% Sn. Experimental results were in agreement with those of calculation. According to SEM and TEM observation, Sn promoted precipitation of Mg17Al12 on aging temperature, however the preferential Mg2Sn phase suppressed discontinuous Mg17Al12 precipitates by hindering the growth of these in their growth direction. AZ80 with 1-2Â wt.% Sn as-aged alloys exhibited outstanding mechanical property that UTS, YS and EL were â¼420Â MPa, â¼290Â MPa and â¼5%, respectively.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Luyao Jiang, Dingfei Zhang, Xiaowei Fan, Fei Guo, Guangshan Hu, Hansong Xue, Fusheng Pan,