Effects of Sb Content on Solidification Pathways and Grain Size of AZ91 Magnesium Alloy

IMR OpenIR

	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
发表期刊	Acta Metallurgica Sinica-English Letters
ISSN	1006-7191
卷号	28 期号:1 页码:115-121
摘要	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.
部门归属	[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
关键词	Mg-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
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73816
专题	中国科学院金属研究所
推荐引用方式 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.