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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
Corresponding AuthorZhang, B.(bxz011@imr.ac.cn) ; Li, X. Y.(xyli@imr.ac.cn)
2022-02-15
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume225Pages:13
AbstractFor 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.
KeywordAl-Mg alloy Stress corrosion cracking Low angle grain boundary Nanostructured Dynamic plastic deformation
Funding OrganizationNational Natural Science Foundation of China ; Ministry of Science and Technology of the People's Republic of China
DOI10.1016/j.actamat.2021.117607
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[52171088] ; Ministry of Science and Technology of the People's Republic of China[2017YFA0204401 and2017YFA0700700]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000793150200005
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/173927
Collection中国科学院金属研究所
Corresponding AuthorZhang, B.; Li, X. Y.
Affiliation1.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
Recommended Citation
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.
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