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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.
2015
Source PublicationActa Metallurgica Sinica-English Letters
ISSN1006-7191
Volume28Issue:1Pages:115-121
AbstractThe 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.
description.department[hou, dan-hui ; 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. ; rschen@imr.ac.cn
KeywordMg-al-zn-sb Alloy Solidification Pathways Nucleation Grain Size Dendrite Coherency Mechanical-properties Thermal-analysis Al-sb Microstructure System Temperatures Behavior Ca
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73816
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
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.
APA 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.
MLA 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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