Effect of solution treatment on microstructure and corrosion properties of Mg-Dy-Zn alloy

	Effect of solution treatment on microstructure and corrosion properties of Mg-Dy-Zn alloy
	Zhang, Fan 2; Bi, Guang-Li 1,2; Li, Yuan-Dong 1,2; Li, Ming 2; Ma-Ying 1,2
刊名	Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment
	2015-04-25
卷号	36 期号:4 页码:85-92
关键词	Alloys Corrosion Corrosion resistance Dysprosium alloys Grain boundaries Hardness Heat resistance Heat treatment Magnesium alloys Microhardness Microstructure Scanning electron microscopy Stainless steel X ray diffraction Zinc Zinc alloys Corrosion property Electrochemical measurements Excellent corrosion resistances Solution heat treated Solution heat treatment Solution temperature Uniform distribution Zn alloys
ISSN号	10096264
英文摘要	Effect of solution heat treatment on microstructure and corrosion properties of Mg-2Dy-0.5Zn magnesium alloy was investigated and analyzed by means of optical microcope (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), micro-hardness test and electrochemical measurement. The results indicate that the microstructure of the as-cast alloy consists of α-Mg dendrite and interdendritic precipitated phases. The precipitated phase is mainly composed of lamellar Mg12ZnDy, honeycomb Mg8ZnDy and small amount of cube-like Mg24Dy5 phases. As the solution temperature (500-540) and solution time (0-12 h) increases, the precipitated phase is gradually dissolved and a small amount of (Mg, Zn)x Dy phase forms sporadically at the grain boundaries. After solution treatment at 530 for 8 h, almost all the precipitated phases are solution into the α-Mg matrix, resulting in the increasing microhardness of α-Mg matrix, and the corresponding hardness value is 74.74 HV0.1. In addition, the electrochemical test results indicate that the solution heat treated (at 530 for 8 h) alloy exhibits excellent corrosion resistance, the corrosion current and corrosion potential are 8.650×10-4 A and -1.159 V, respectively. The excellent corrosion resistance is mainly attributed to the uniform distribution of alloy elements, low volume fraction of precipitated phases and the fine grain size. ©, 2015, Editorial Office of Transactions of Materials and Heat Treatment. All right reserved.
语种	中文
出版者	Editorial Office of Transactions of Materials and Heat Treatment
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/112367]
专题	材料科学与工程学院兰州理工大学
作者单位	1.Key Laboratory of Non-ferrous Metal Alloys, The Ministry of Education, Lanzhou University of Technology, Lanzhou, China 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou, China;
推荐引用方式 GB/T 7714	Zhang, Fan,Bi, Guang-Li,Li, Yuan-Dong,et al. Effect of solution treatment on microstructure and corrosion properties of Mg-Dy-Zn alloy[J]. Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment,2015,36(4):85-92.
APA	Zhang, Fan,Bi, Guang-Li,Li, Yuan-Dong,Li, Ming,&Ma-Ying.(2015).Effect of solution treatment on microstructure and corrosion properties of Mg-Dy-Zn alloy.Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment,36(4),85-92.
MLA	Zhang, Fan,et al."Effect of solution treatment on microstructure and corrosion properties of Mg-Dy-Zn alloy".Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment 36.4(2015):85-92.