Microstructure, Mechanical Properties and First Principle Calculation of Mg-7Al (-2Sn) Alloys Prepared by Vacuum Die-casting

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	Microstructure, Mechanical Properties and First Principle Calculation of Mg-7Al (-2Sn) Alloys Prepared by Vacuum Die-casting
其他题名	Microstructure, Mechanical Properties and First Principle Calculation of Mg-7Al (-2Sn) Alloys Prepared by Vacuum Die-casting
	Wang Feng 1; Sun Shijie 1; Mao Pingli 1; Liu Zheng 1; An Shuaijie 2
	2015
发表期刊	RARE METAL MATERIALS AND ENGINEERING
ISSN	1002-185X
卷号	44 期号:7 页码:1668-1673
摘要	The effects of 2 wt% Sn on the microstructures and the mechanical properties of the die-cast Mg-7Al alloy and the solution-treated alloy were studied by optical microscope (OM), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), X-ray diffraction (XRD), differential scanning calorimetry (DSC) and tensile tests. The results show that after 2 wt% Sn is added into the Mg-7Al alloys, the grains are refined, the growth of Mg17Al12 phase is suppressed and a few dispersed Mg2Sn particles with granular morphology are formed. After solution treatment the second phases of Mg-7Al alloys drastically decrease while fine granular Mg2Sn phases are still on the AT72 alloy matrix. AT72 alloy exhibits better tensile properties at both room and elevated temperature than Mg-7Al alloys due to the refinement of grains, increase of second phases, optimum morphology of Mg17Al12 and precipitation of Mg2Sn with better thermodynamic properties. The mechanical properties are improved after solid-solution treatment, which is attributed to solid-solution strengthening and dispersion strengthening. In addition, from the view of microscopic theory, the effect of Sn on the improvement of the mechanical properties of Mg-7Al alloy at elevated temperatures was discussed by first-principle calculation.
关键词	AZ91 MAGNESIUM ALLOY SN ADDITION AL ALLOYS SB 1ST-PRINCIPLES Mg-Al alloy alloying microstructure mechanical properties first principle
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:5480777
引用统计	被引频次：1[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/89897
专题	中国科学院金属研究所
作者单位	1.沈阳大学 2.中国科学院金属研究所
推荐引用方式 GB/T 7714	Wang Feng,Sun Shijie,Mao Pingli,et al. Microstructure, Mechanical Properties and First Principle Calculation of Mg-7Al (-2Sn) Alloys Prepared by Vacuum Die-casting[J]. RARE METAL MATERIALS AND ENGINEERING,2015,44(7):1668-1673.
APA	Wang Feng,Sun Shijie,Mao Pingli,Liu Zheng,&An Shuaijie.(2015).Microstructure, Mechanical Properties and First Principle Calculation of Mg-7Al (-2Sn) Alloys Prepared by Vacuum Die-casting.RARE METAL MATERIALS AND ENGINEERING,44(7),1668-1673.
MLA	Wang Feng,et al."Microstructure, Mechanical Properties and First Principle Calculation of Mg-7Al (-2Sn) Alloys Prepared by Vacuum Die-casting".RARE METAL MATERIALS AND ENGINEERING 44.7(2015):1668-1673.