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Microstructure and corrosion behavior of AlCoCrFeNiSi0.1 high-entropy alloy
Xiang, C.; Zhang, Z. M.; Fu, H. M.; Han, E-H; Zhang, H. F.; Wang, J. Q.
2019-11-01
Source PublicationINTERMETALLICS
ISSN0966-9795
Volume114
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
Indexed BySCI
Language英语
WOS IDWOS:000495497400005
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80664
Collection中国科学院金属研究所
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.
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.
MLA Xiang, C.,et al."Microstructure and corrosion behavior of AlCoCrFeNiSi0.1 high-entropy alloy".INTERMETALLICS 114(2019).
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