Improving the strength and SCC resistance of an Al-5Mg-3Zn alloy with low-angle grain boundary structure

doi:10.1016/j.jmst.2023.02.063

IMR OpenIR

	Improving the strength and SCC resistance of an Al-5Mg-3Zn alloy with low-angle grain boundary structure
	Tang, Z. C.1,2; Xu, W.1; Zhao, D. Y.1; Zhang, B.1
通讯作者	Zhang, B.(bxz011@imr.ac.cn)
	2023-10-20
发表期刊	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN	1005-0302
卷号	161 页码:63-73
摘要	The strength of traditional Al-Mg alloys is relatively low because it mainly relies on solid solution strengthening. Adding a third component to form precipitation can improve their strength, but it usually leads to high-stress corrosion cracking (SCC) sensitivity due to the formation of high-density precipitates at grain boundaries (GBs). So far, it is still challenging to improve the strength of Al-Mg alloys without reducing SCC resistance. Herein, a nanostructured Al-5Mg-3 Zn alloy with a good yield strength of 336 MPa and good elongation was successfully produced. By dynamic plastic deformation and appropriate annealing treatment, near-equiaxed nanograins were introduced in the nanostructured Al-5Mg-3 Zn alloy with a high proportion (71%) of the low-angle grain boundary. TEM statistical investigations show that the precipitation of active T' phase at GBs has been greatly suppressed in the nanostructured Al-5Mg-3 Zn alloy at sensitized conditions, and the area fraction of GB precipitates is reduced from 72% to 21%, which significantly decreases the SCC susceptibility. This study provides guidance for developing advanced Al-Mg alloy with high SCC resistance. (c) 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
关键词	Al-5Mg-3 Zn alloy Stress corrosion cracking Low angle grain boundary Nanostructured Dynamic plastic deformation
资助者	National Nat- ural Science Foundation of China ; Young Elite Scientists Sponsorship Program by CAST
DOI	10.1016/j.jmst.2023.02.063
收录类别	SCI
语种	英语
资助项目	National Nat- ural Science Foundation of China[52171088] ; Young Elite Scientists Sponsorship Program by CAST[2022QNRC001]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001003547100001
出版者	JOURNAL MATER SCI TECHNOL
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/178223
专题	中国科学院金属研究所
通讯作者	Zhang, B.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Tang, Z. C.,Xu, W.,Zhao, D. Y.,et al. Improving the strength and SCC resistance of an Al-5Mg-3Zn alloy with low-angle grain boundary structure[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2023,161:63-73.
APA	Tang, Z. C.,Xu, W.,Zhao, D. Y.,&Zhang, B..(2023).Improving the strength and SCC resistance of an Al-5Mg-3Zn alloy with low-angle grain boundary structure.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,161,63-73.
MLA	Tang, Z. C.,et al."Improving the strength and SCC resistance of an Al-5Mg-3Zn alloy with low-angle grain boundary structure".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 161(2023):63-73.