Effects of heat-treatment technology on microstructure and mechanical properties of Mg-6Zn-2Sm-0.4Zr magnesium alloy

doi:10.19476/j.ysxb.1004.0609.2017.10.01

	Effects of heat-treatment technology on microstructure and mechanical properties of Mg-6Zn-2Sm-0.4Zr magnesium alloy
	Zhang, Yu 2; Huang, Xiao-Feng 1,2; Ma, Zhen-Duo 2; Li, Ya 2; Ma, Ying 1,2; Hao, Yuan 1,2
刊名	Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
	2017-10-01
卷号	27 期号:10 页码:1961-1969
关键词	Binary alloys Grain boundaries Heat treatment Magnesium metallography Mechanical properties Microhardness Microstructure Morphology Samarium alloys Scanning electron microscopy Tensile strength X ray diffraction analysis Zinc alloys Zinc metallography Zircaloy Zirconium metallography Aging treatment Effects of heat treatment Energy dispersive spectrometry Homogeneous microstructure Mechanical performance Microstructure and mechanical properties Solution treatments Ultimate tensile strength
ISSN号	10040609
DOI	10.19476/j.ysxb.1004.0609.2017.10.01
英文摘要	A new type Mg-6Zn-2Sm-0.4Zr alloy was fabricated by adding 0.4%Zr and 2%Sm (mass fraction) in Mg-6Zn alloy, and the microstructure and mechanical properties of the cast alloy under the conditions of as-cast, solution and aging treatment were investigated by optical microscopy (OM), scanning electron microscopy (SEM) with equipped energy dispersive spectrometry (EDS), X-ray diffractometry (XRD), micro-hardness and mechanical tests. The results indicate that the as-cast alloy is mainly composed of matrix α-Mg, eutectic phases (α-Mg+Mg2Zn3+Mg41Sm5) with continuous or semi-continuous morphology distributed along grain boundaries and a few isolated particles inside grains. The alloy is solutionized at 440 and 450 for 12-36 h, with the increment of solution temperature and time, the solution effect gradually increases. When the alloy is treated at 450 for 28 h, the alloy exhibits relatively homogeneous microstructure and attains mechanical performance with ultimate tensile strength (UTS) of 230 MPa and elongation (EL) of 9.58%, respectively. After the alloy being aged at 200 for 6-48 h, the mechanical properties of alloy increase obviously, and the aging strengthening effect increases firstly and then decreases, the peak values of UTS (258 MPa) and EL (14.43%) of the alloy aged at 200 for 12 h are simultaneously obtained, which are increased by 44 MPa and 90.80% compared with those of the as-cast alloy, respectively. © 2017, Science Press. All right reserved.
语种	中文
出版者	Central South University of Technology
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114331]
专题	材料科学与工程学院
作者单位	1.Key Laboratory of Non-ferrous Metal Alloys and Processing, Ministry of Education, Lanzhou University of Technology, Lanzhou; 730050, China 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Zhang, Yu,Huang, Xiao-Feng,Ma, Zhen-Duo,et al. Effects of heat-treatment technology on microstructure and mechanical properties of Mg-6Zn-2Sm-0.4Zr magnesium alloy[J]. Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,2017,27(10):1961-1969.
APA	Zhang, Yu,Huang, Xiao-Feng,Ma, Zhen-Duo,Li, Ya,Ma, Ying,&Hao, Yuan.(2017).Effects of heat-treatment technology on microstructure and mechanical properties of Mg-6Zn-2Sm-0.4Zr magnesium alloy.Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,27(10),1961-1969.
MLA	Zhang, Yu,et al."Effects of heat-treatment technology on microstructure and mechanical properties of Mg-6Zn-2Sm-0.4Zr magnesium alloy".Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 27.10(2017):1961-1969.