Effect of Intermetallic Phases on Corrosion Initiation of AZ91 Alloy With Rare Earth Y Addition

IMR OpenIR

	Effect of Intermetallic Phases on Corrosion Initiation of AZ91 Alloy With Rare Earth Y Addition
	Zhang, Li-na; Jia, Ruiling; Li, Dan; Zhang, Wei; Guo, Feng; jrl014014@163.com
	2015
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	31 期号:5 页码:504-511
摘要	The effect of the rare earth (RE) element Y on the microstructure of AZ91 Mg alloy is investigated. A detailed description of the procedure of identifying the intermetallic phases containing Y in the AZ91 Mg alloy with 0.9 wt% Y addition is presented. The results shows that there are two different kinds of RE phases in scanning electron microscopy (SEM) images. Energy dispersive spectrum (EDS) analysis shows that one is rich in Y element and the other is rich in Mn element. According to the element mapping of electron probe microanalysis (EPMA), the element Al can be found not only in the beta-Mg17Al12 phase but also in these two RE phases. X-ray diffraction (XRD) and transmission electron microscopy (TEM) results further confirm one of the two RE phases is Al2Y; the phase of Al10Mn2Y has just been determined by transmission electron microscopy (TEM) instead of XRD probably because it is scarce. The shapes of these two RE intermetallic phases are pretty similar. The 3D digital microscopy is employed to observe in-situ the effect of the beta phase and the above two RE intermetallic phases on the corrosion initiation of the alloys. The results show that the corrosion attack of AZ91 Mg alloy without Y addition starts around the eutectic phase beta-Mg17Al12. With the addition of 0.9 wt% Y, the two kinds of Y-rich intermetallic phases act as cathodic effect and alpha phase in the adjacent of them was activated and cathodic effect of the beta-Mg17Al12 phase was inhibited. Copyright (C) 2015, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited. All rights reserved.
部门归属	[zhang, li-na ; jia, ruiling ; li, dan ; guo, feng] inner mongolia univ technol, sch mat sci & engn, hohhot 010051, inner mongolia, peoples r china ; [jia, ruiling ; zhang, wei] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china
关键词	Mg Alloy Yttrium Intermetallic Phase Corrosion Initiation
资助者	National Natural Science Foundation of China [51101082]; Natural Science Foundation of Inner Mongolia [2010BS0801]; Science and Technology Research Project of Colleges and Universities of Inner Mongolia [NJ10071]; Open-ends Foundation of State Key Laboratory for Corrosion Protection [SKLCP2012KF09]
收录类别	sci
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/74759
专题	中国科学院金属研究所
通讯作者	jrl014014@163.com
推荐引用方式 GB/T 7714	Zhang, Li-na,Jia, Ruiling,Li, Dan,et al. Effect of Intermetallic Phases on Corrosion Initiation of AZ91 Alloy With Rare Earth Y Addition[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2015,31(5):504-511.
APA	Zhang, Li-na,Jia, Ruiling,Li, Dan,Zhang, Wei,Guo, Feng,&jrl014014@163.com.(2015).Effect of Intermetallic Phases on Corrosion Initiation of AZ91 Alloy With Rare Earth Y Addition.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,31(5),504-511.
MLA	Zhang, Li-na,et al."Effect of Intermetallic Phases on Corrosion Initiation of AZ91 Alloy With Rare Earth Y Addition".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 31.5(2015):504-511.