|Microstructure and tensile properties of as-cast and as-aged Mg-6Al-4Zn alloys with Sn addition|
|X. G. Dong; J. W. Fu; J. Wang; Y. S. Yang
|Source Publication||Materials & Design
|Abstract||The effect of 0-1.8 wt.% Sn addition on the microstructure and tensile properties of Mg-6Al-4Zn alloys was investigated. The results indicate that alpha-Mg dendrite is gradually refined with increasing Sn content and interdendritic Mg-21(Al, Zn)(17) and Mg17Al12 intermetallics can also be refined with 0.6 wt.% Sn addition. However, higher Sn addition leads to the coarsening and continuous distribution of the interdendritic intermetallics due to the stronger interdendritic segregation of Al and Zn. With the modified casting structure, the as-cast Mg-6Al-4Zn-0.6Sn alloy shows optimal ultimate tensile strength and elongation. After ageing treatment, the density of nano-scaled continuous precipitates into alpha-Mg matrix in all the Sn-containing alloys is enhanced markedly, which results in higher tensile strength due to enhanced ageing strengthening. Meanwhile, based on the microstructural analyses, alloy with 1.2 wt.% Sn can restrict forming discontinuous precipitates at grain boundary effectively. The as-aged Mg-6Al-4Zn-1.2Sn alloy possesses the excellent combination of strength and ductility. (c) 2013 Elsevier Ltd. All rights reserved.|
; fu, junwei
; wang, jing
; yang, yuansheng] chinese acad sci, inst met res, shenyang 110016, peoples r china.
; yang, ys (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china.
|Keyword||Non-ferrous Metals And Alloys
X. G. Dong,J. W. Fu,J. Wang,et al. Microstructure and tensile properties of as-cast and as-aged Mg-6Al-4Zn alloys with Sn addition[J]. Materials & Design,2013,51:567-574.
X. G. Dong,J. W. Fu,J. Wang,&Y. S. Yang.(2013).Microstructure and tensile properties of as-cast and as-aged Mg-6Al-4Zn alloys with Sn addition.Materials & Design,51,567-574.
X. G. Dong,et al."Microstructure and tensile properties of as-cast and as-aged Mg-6Al-4Zn alloys with Sn addition".Materials & Design 51(2013):567-574.
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