|Effects of Sb Content on Solidification Pathways and Grain Size of AZ91 Magnesium Alloy|
|D. H.; Liang Hou, S. M.; Chen, R. S.; Dong, C.; Han, E. H.
|Source Publication||Acta Metallurgica Sinica-English Letters
|Abstract||The phase constitution and solidification pathways of AZ91 + xSb (x = 0, 0.1, 0.5, 1, in wt%) alloys were investigated through ways of microstructure observation, thermal analysis technique, and thermodynamic calculation. It was found that the non-equilibrium solidification microstructure of AZ91 + xSb (x = 0.1, 0.5, 1) is composed of alpha-Mg matrix, beta-Mg17Al12 phase, and intermetallic compound Mg3Sb2. The grain size of the alloys with different Sb contents was quantitatively determined by electron backscattered diffraction technique which shows no grain refinement in Sb-containing AZ91 alloy. Thermodynamic calculations are in reasonable agreement with thermal analysis results, showing that the Mg3Sb2 phase forms after alpha-Mg nucleation, thus impossible acts as heterogeneous nucleus for alpha-Mg dendrite. Besides, the solid fraction at dendrite coherency point (f(s)(DCP)) determined from thermal analysis decreases slightly with increasing Sb content, which is consistent with the fact that Sb does not refine the grain size of AZ91 alloy.|
; dong, chuang] dalian univ technol, sch mat sci & engn, dalian 116024, peoples r china. [hou, dan-hui
; chen, rong-shi
; han, en-hou] chinese acad sci, inst met res, shenyang 110016, peoples r china. [liang, song-mao] tech univ clausthal, inst met, d-38678 clausthal zellerfeld, germany.
; chen, rs (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china.
D. H.,Liang Hou, S. M.,Chen, R. S.,et al. Effects of Sb Content on Solidification Pathways and Grain Size of AZ91 Magnesium Alloy[J]. Acta Metallurgica Sinica-English Letters,2015,28(1):115-121.
D. H.,Liang Hou, S. M.,Chen, R. S.,Dong, C.,&Han, E. H..(2015).Effects of Sb Content on Solidification Pathways and Grain Size of AZ91 Magnesium Alloy.Acta Metallurgica Sinica-English Letters,28(1),115-121.
D. H.,et al."Effects of Sb Content on Solidification Pathways and Grain Size of AZ91 Magnesium Alloy".Acta Metallurgica Sinica-English Letters 28.1(2015):115-121.
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