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Microstructure and corrosion behavior of AlCoCrFeNiSi0.1 high-entropy alloy
Xiang, C.1,2; Zhang, Z. M.2; Fu, H. M.3; Han, E-H2; Zhang, H. F.3; Wang, J. Q.2
Corresponding AuthorHan, E-H(ehhan@imr.ac.cn)
2019-11-01
Source PublicationINTERMETALLICS
ISSN0966-9795
Volume114Pages:10
AbstractThe microstructure and corrosion behavior of AlCoCrFeNiSi0.1 high-entropy alloy are investigated. The alloy was prepared by vacuum arc melting and subsequent injection casting. Two different phases, including one disordered BCC (A2) phase and one ordered BCC (B2) phase, are identified in this alloy. The alloy shows a typical equiaxed dendritic microstructure, both of the dendritic and interdendritic regions have an (Al, Ni)-rich matrix with B2 structure and (Cr, Fe)-rich precipitates with A2 structure. The precipitates present different morphologies in the dendritic and interdendritic regions, whereas the chemical composition and crystal structure are very similar. With regard to the corrosion behavior in deaerated 3.5 wt% NaCl solution, the pits were formed at the dendrites, and the selective dissolution of the dendrites could be mainly ascribed to the lower Cr content and galvanic coupling between the dendrites and the interdendrites. The alloy exhibits an active-passive corrosion behavior in deaerated 0.5 mol/L H2SO4 solution. The preferential dissolution of the A2 phase is more severe than the B2 phase. The correlation between chemical composition, microstructure, and corrosion behavior is well illustrated.
KeywordHigh-entropy alloy Crystal structure Microstructure Segregation Corrosion Electrochemistry
Funding OrganizationKey Program of the Chinese Academy of Sciences
DOI10.1016/j.intermet.2019.106599
Indexed BySCI
Language英语
Funding ProjectKey Program of the Chinese Academy of Sciences[ZDRW-CN-2017-1]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000495497400005
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/136896
Collection中国科学院金属研究所
Corresponding AuthorHan, E-H
Affiliation1.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China
2.Chinese Acad Sci, CAS Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Xiang, C.,Zhang, Z. M.,Fu, H. M.,et al. Microstructure and corrosion behavior of AlCoCrFeNiSi0.1 high-entropy alloy[J]. INTERMETALLICS,2019,114:10.
APA Xiang, C.,Zhang, Z. M.,Fu, H. M.,Han, E-H,Zhang, H. F.,&Wang, J. Q..(2019).Microstructure and corrosion behavior of AlCoCrFeNiSi0.1 high-entropy alloy.INTERMETALLICS,114,10.
MLA Xiang, C.,et al."Microstructure and corrosion behavior of AlCoCrFeNiSi0.1 high-entropy alloy".INTERMETALLICS 114(2019):10.
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