Microstructure and corrosion behavior of AlCoCrFeNiSi0.1 high-entropy alloy

doi:10.1016/j.intermet.2019.106599

CORC > 金属研究所 > 中国科学院金属研究所

	Microstructure and corrosion behavior of AlCoCrFeNiSi0.1 high-entropy alloy
	Xiang, C.1,3; Zhang, Z. M.3; Fu, H. M.2; Han, E-H 3; Zhang, H. F.2; Wang, J. Q.3
刊名	INTERMETALLICS
	2019-11-01
卷号	114 页码:10
关键词	High-entropy alloy Crystal structure Microstructure Segregation Corrosion Electrochemistry
ISSN号	0966-9795
DOI	10.1016/j.intermet.2019.106599
通讯作者	Han, E-H(ehhan@imr.ac.cn)
英文摘要	The 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.
资助项目	Key Program of the Chinese Academy of Sciences[ZDRW-CN-2017-1]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000495497400005
资助机构	Key Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/136898]
专题	金属研究所_中国科学院金属研究所
通讯作者	Han, E-H
作者单位	1.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 3.Chinese Acad Sci, CAS Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 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.