Stress corrosion cracking resistant nanostructured Al-Mg alloy with low angle grain boundaries

doi:10.1016/j.actamat.2021.117607

IMR OpenIR

	Stress corrosion cracking resistant nanostructured Al-Mg alloy with low angle grain boundaries
	Xu, W.1; Xin, Y. C.1,2; Zhang, B.1; Li, X. Y.1
通讯作者	Zhang, B.(bxz011@imr.ac.cn) ; Li, X. Y.(xyli@imr.ac.cn)
	2022-02-15
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	225 页码:13
摘要	For decades, high susceptibility to intergranular corrosion and stress corrosion cracking is the Achilles's heel for the 5xxx series Al alloys with high Mg ( > 3 wt%) owing to precipitation of electrochemically active Mg-rich ,B phase at grain boundaries (GBs) at moderately elevated temperatures. Herein, nanostructured Al-5Mg alloy with a high proportion of low angle grain boundary equiaxed grains were generated by dynamic plastic deformation and appropriate annealing treatment. Electron back-scattered diffraction discloses that the fraction of low angle boundaries reaches 70%, which has been demonstrated to greatly suppress the precipitation of ,B phase at GBs. The nanostructured Al-5Mg alloy exhibits excellent intergranular corrosion resistance and stress corrosion cracking resistance after being sensitized at 150 degrees C for 100 h. Moreover, its strength and ductility are much higher than the corresponding coarse-grained alloys, thus solving the classic problem that has existed for decades. The introduction of a high fraction of low angle grain boundaries by dynamic plastic deformation and appropriate annealing provides a novel strategy for the development of advanced nanostructured Al alloys. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Al-Mg alloy Stress corrosion cracking Low angle grain boundary Nanostructured Dynamic plastic deformation
资助者	National Natural Science Foundation of China ; Ministry of Science and Technology of the People's Republic of China
DOI	10.1016/j.actamat.2021.117607
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52171088] ; Ministry of Science and Technology of the People's Republic of China[2017YFA0204401 and2017YFA0700700]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000793150200005
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：108[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/321006/173927
专题	中国科学院金属研究所
通讯作者	Zhang, B.; Li, X. Y.
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, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Xu, W.,Xin, Y. C.,Zhang, B.,et al. Stress corrosion cracking resistant nanostructured Al-Mg alloy with low angle grain boundaries[J]. ACTA MATERIALIA,2022,225:13.
APA	Xu, W.,Xin, Y. C.,Zhang, B.,&Li, X. Y..(2022).Stress corrosion cracking resistant nanostructured Al-Mg alloy with low angle grain boundaries.ACTA MATERIALIA,225,13.
MLA	Xu, W.,et al."Stress corrosion cracking resistant nanostructured Al-Mg alloy with low angle grain boundaries".ACTA MATERIALIA 225(2022):13.