Influence of Scandium Addition on Stress Corrosion Cracking Susceptibility of Al-Zn-Mg Alloy in Different Corrosive Environments

doi:10.3390/met8040225

IMR OpenIR

	Influence of Scandium Addition on Stress Corrosion Cracking Susceptibility of Al-Zn-Mg Alloy in Different Corrosive Environments
	Li, Zhaoming 1,2; Jiang, Haichang 1; Yan, Desheng 1; Rong, Lijian 1
通讯作者	Jiang, Haichang(hcjiang@imr.ac.cn) ; Rong, Lijian(ljrong@imr.ac.cn)
	2018-04-01
发表期刊	METALS
ISSN	2075-4701
卷号	8 期号:4 页码:12
摘要	Stress corrosion cracking (SCC) susceptibilities of Al-Zn-Mg alloys without and with Scandium addition were evaluated in 3.5% NaCl solution at different pH and different strain rate, using slow strain rate test technique. The results indicate that Sc addition reduces grain size and width of precipitation free zones, and transforms grain boundary precipitates from continuous distribution into interrupted distribution by inhibiting recrystallization. In solution at pH 1, pH 3 and pH 7, Sc addition reduces the degree of localized corrosion of alloy surface and SCC susceptibility of Al-Zn-Mg alloy. However, in solution at pH 10 and pH 12, grain refinement significantly promotes the diffusion of hydrogen atoms into matrix, thus Sc addition increases SCC susceptibility of Al-Zn-Mg alloy. Under different strain rate conditions, Sc addition can all reduce SCC susceptibility of Al-Zn-Mg alloy in solution at pH 1, pH 3 and pH 7, and can all increase SCC susceptibility of Al-Zn-Mg alloy in solution at pH 10 and pH 12. As a result, Sc modified Al-Zn-Mg alloy in practical applications should be avoided in alkaline environments.
关键词	Al-Zn-Mg alloy solution pH strain rate stress corrosion cracking susceptibility
资助者	State's Key Project of Research and Development ; Strategic Priority Program of the Chinese Academy of Sciences
DOI	10.3390/met8040225
收录类别	SCI
语种	英语
资助项目	State's Key Project of Research and Development[2016YFB1200600] ; Strategic Priority Program of the Chinese Academy of Sciences[XDB22000000]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000434882800028
出版者	MDPI
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/128571
专题	中国科学院金属研究所
通讯作者	Jiang, Haichang; Rong, Lijian
作者单位	1.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Zhaoming,Jiang, Haichang,Yan, Desheng,et al. Influence of Scandium Addition on Stress Corrosion Cracking Susceptibility of Al-Zn-Mg Alloy in Different Corrosive Environments[J]. METALS,2018,8(4):12.
APA	Li, Zhaoming,Jiang, Haichang,Yan, Desheng,&Rong, Lijian.(2018).Influence of Scandium Addition on Stress Corrosion Cracking Susceptibility of Al-Zn-Mg Alloy in Different Corrosive Environments.METALS,8(4),12.
MLA	Li, Zhaoming,et al."Influence of Scandium Addition on Stress Corrosion Cracking Susceptibility of Al-Zn-Mg Alloy in Different Corrosive Environments".METALS 8.4(2018):12.