Effects of heat treatment technology on microstructure and mechanical properties of mg-6zn-3al magnesium alloy

doi:10.19476/j.ysxb.1004.0609.2018.06.02

	Effects of heat treatment technology on microstructure and mechanical properties of mg-6zn-3al magnesium alloy
	Zhang, Yu 1; Huang, Xiao-Feng 1,2; Guo, Feng 1; Li, Yuan-Dong 1,2; Bi, Guang-Li 1,2; Ma, Ying 1,2; Hao, Yuan 1,2
刊名	Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
	2018-06-01
卷号	28 期号:6 页码:1092-1100
关键词	Aluminum alloys Casting Grain boundaries Heat treatment Magnesium castings Mechanical properties Microhardness Microstructure Morphology Precipitation (chemical) Tensile strength Ternary alloys Zinc alloys Aging treatment Effects of heat treatment Homogeneous microstructure Increasing solutions Microstructure and mechanical properties Precipitation morphologies Solution treatments Ultimate tensile strength
ISSN号	10040609
DOI	10.19476/j.ysxb.1004.0609.2018.06.02
英文摘要	A new type Mg-6Zn-3Al (noted ZA63, mass fraction, %) magnesium alloy was prepared by permanent mould casting, and the microstructure and mechanical properties of the alloy under the conditions of as-cast, solution and aging treatment were systematically investigated by OM, SEM, TEM, XRD and mechanical tests, respectively. The results indicate that the as-cast alloy is mainly comprised of matrix α-Mg, eutectic phases (α-Mg+Mg2Zn3+Mg7Zn3+ Mg32(Al,Zn)49) with continuous or semi-continuous precipitated along grain boundaries and a few divorced granules within grains. When the alloy is treated at 350 for 12-36 h, the solution effects are gradually enhanced with increasing solution time. At 350 for 28 h, the alloy reveals relatively homogeneous microstructure, and the ultimate tensile strength (UTS) and elongation (EL) of 241 MPa and 11.12% are achieved, respectively. Subsequently, when the alloy is aged at 180 for 6-72 h, the mechanical test demonstrates that, the UTS further increases, the mechanical properties increase firstly and then decrease, the peak values of UTS, EL and micro-hardness of the alloy aged at 180 for 24 h are simultaneously obtained, which are 298 MPa, 9.78% and 96.3 HV and increase by 39.25%, 14.52% and 54.82% compared with those of the as-cast alloy (214 MPa, 8.54% and 62.2 HV), respectively. There are mainly two types of precipitates of the alloy after aging at 180 for 24 h, namely, the first precipitate is lath-like, the secondary one is a short-rod. © 2018, 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/114164]
专题	材料科学与工程学院
作者单位	1.tate Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Non-ferrous Metal Alloys and Processing, Ministry of Education, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhang, Yu,Huang, Xiao-Feng,Guo, Feng,et al. Effects of heat treatment technology on microstructure and mechanical properties of mg-6zn-3al magnesium alloy[J]. Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,2018,28(6):1092-1100.
APA	Zhang, Yu.,Huang, Xiao-Feng.,Guo, Feng.,Li, Yuan-Dong.,Bi, Guang-Li.,...&Hao, Yuan.(2018).Effects of heat treatment technology on microstructure and mechanical properties of mg-6zn-3al magnesium alloy.Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,28(6),1092-1100.
MLA	Zhang, Yu,et al."Effects of heat treatment technology on microstructure and mechanical properties of mg-6zn-3al magnesium alloy".Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 28.6(2018):1092-1100.