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

doi:10.1016/j.intermet.2019.106599

IMR OpenIR

	Microstructure and corrosion behavior of AlCoCrFeNiSi0.1 high-entropy alloy
	Xiang, C.1,2; Zhang, Z. M.2; Fu, H. M.3; Han, E-H 2; Zhang, H. F.3; Wang, J. Q.2
通讯作者	Han, E-H(ehhan@imr.ac.cn)
	2019-11-01
发表期刊	INTERMETALLICS
ISSN	0966-9795
卷号	114 页码:10
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.
关键词	High-entropy alloy Crystal structure Microstructure Segregation Corrosion Electrochemistry
资助者	Key Program of the Chinese Academy of Sciences
DOI	10.1016/j.intermet.2019.106599
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000495497400005
出版者	ELSEVIER SCI LTD
引用统计	被引频次：56[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/321006/136896
专题	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, 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
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.