Effects of samarium addition on as-cast microstructure, grain refinement and mechanical properties of Mg-6Zn-0.4Zr magnesium alloy

doi:10.1016/S1002-0721(17)60939-6

	Effects of samarium addition on as-cast microstructure, grain refinement and mechanical properties of Mg-6Zn-0.4Zr magnesium alloy
	Zhang Yu; Huang Xiaofeng; Li Ya; Ma Zhenduo; Ma Ying; Hao Yuan
刊名	JOURNAL OF RARE EARTHS
	2017-05
卷号	35 期号:5 页码:494-502
关键词	Mg-Zn-Zr magnesium alloy Sm addition microstructure grain refinement mechanical property fracture behavior rare earths
ISSN号	1002-0721
DOI	10.1016/S1002-0721(17)60939-6
英文摘要	In this paper, the microstructural evolution, grain refinement and mechanical properties of as-cast Mg-6Zn-0.4Zr alloys with varying Sm contents (0, 2 wt.%, 4 wt.% and 6 wt.%) were investigated by using an optical microscope (OM), a scanning electron microscope (SEM) equipped with energy dispersive spectroscope (EDS), an X-ray diffractometer (XRD) and mechanical tests at room temperature, respectively. The experimental results indicated that the addition of Sm could obviously refine the as-cast grains, modify the eutectic morphology and affect the mechanical properties of the alloys. The main phases in Mg-6Zn-xSm-0.4Zr alloys included matrix alpha-Mg, Mg2Zn3, Mg41Sm5 and MgZnSm. With Sm content increasing to 4%, the MgZnSm phase was created, meanwhile, the morphology of some eutectic phases revealed apparently lamellar structure, which had a bad effect on the mechanical properties. In addition, the maximum values of ultimate tensile strength (UTS, 214 MPa) and elongation (EL, 7.42%) were simultaneously obtained from the alloy with 2% Sm. However, Sm addition had no obvious effects on the fracture behavior of the alloys, namely, the fracture pattern of Mg-6Zn-0.4Zr alloy belonged to inter-granular and brittle modes while the fracture regimes of all the Sm-containing alloys were dominated by the mixture of inter-granular and trans-granular modes.
资助项目	National Nature Science Foundations of China[51464032] ; National Basic Research Program of China[2010CB635106]
WOS研究方向	Chemistry
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000401090100012
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33273]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Huang Xiaofeng
作者单位	Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Zhang Yu,Huang Xiaofeng,Li Ya,et al. Effects of samarium addition on as-cast microstructure, grain refinement and mechanical properties of Mg-6Zn-0.4Zr magnesium alloy[J]. JOURNAL OF RARE EARTHS,2017,35(5):494-502.
APA	Zhang Yu,Huang Xiaofeng,Li Ya,Ma Zhenduo,Ma Ying,&Hao Yuan.(2017).Effects of samarium addition on as-cast microstructure, grain refinement and mechanical properties of Mg-6Zn-0.4Zr magnesium alloy.JOURNAL OF RARE EARTHS,35(5),494-502.
MLA	Zhang Yu,et al."Effects of samarium addition on as-cast microstructure, grain refinement and mechanical properties of Mg-6Zn-0.4Zr magnesium alloy".JOURNAL OF RARE EARTHS 35.5(2017):494-502.