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Analysis on the key role in corrosion behavior of CoCrNiAlTi-based high entropy alloy
Huang, Lei1; Wang, Xuejie2; Zhao, Xingchuan1; Wang, Changzheng1; Yang, Yuansheng3
Corresponding AuthorWang, Changzheng(wangchangzheng@lcu.edu.cn)
2021-02-01
Source PublicationMATERIALS CHEMISTRY AND PHYSICS
ISSN0254-0584
Volume259Pages:9
AbstractIn this study, CoCr2Ni2AlTi, Co2Cr2Ni2AlTi and CoCr2Ni3AlTi alloys are prepared using vacuum arc melting furnace. The morphology, microstructure, compositions and corrosion behavior in 3.5 wt% NaCl solution or 0.5 M H2SO4 solution are investigated by means of scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersive spectrometer (EDS) and electro-chemical workstation, respectively. The results show that all high entropy alloys (HEAs) display analogous petal-like equi-axed dendrite and the dendrite arms are thin-like strip. The BCC1 phase is mainly rich in Al-Ni-Ti elements, the BCC2 is rich in Cr element and the FCC phase is composed of Co-Ti elements. Besides, the high contents of Co can promote distribution of Cr into inter-dendrite and can promote the formation of the nano-particles. In addition, all HEAs have better corrosion resistance than 304 stainless steel or other corrosion resistant HEAs and Co2Cr2Ni2AlTi has the best corrosion resistance in three HEAs under NaCl solution or H2SO4 solution. Cr element can form the passivation film Cr2O3, which has an important role in improving corrosion resistance. Co element can increase the stability of the passivation film and attenuates the hydrolysis of Cr3+. Ni element cannot increase the stability of the passivation film and promote the hydrolysis of Cr3+ in H2SO4 solution.
KeywordHigh entropy alloys Corrosion behavior Microstructure Chemical composition
Funding OrganizationNature Science Foundation of Shandong Province
DOI10.1016/j.matchemphys.2020.124007
Indexed BySCI
Language英语
Funding ProjectNature Science Foundation of Shandong Province[ZR2018MEM005.D: \MYFILES\ELSEVIER\MAC\00124007\SCE\gs1]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000615731100001
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/160445
Collection中国科学院金属研究所
Corresponding AuthorWang, Changzheng
Affiliation1.Liaocheng Univ, Sch Mat Sci & Engn, Liaocheng 252000, Shandong, Peoples R China
2.Qingdao Univ, Sch Mat Sci & Engn, Qingdao 266071, Shandong, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Huang, Lei,Wang, Xuejie,Zhao, Xingchuan,et al. Analysis on the key role in corrosion behavior of CoCrNiAlTi-based high entropy alloy[J]. MATERIALS CHEMISTRY AND PHYSICS,2021,259:9.
APA Huang, Lei,Wang, Xuejie,Zhao, Xingchuan,Wang, Changzheng,&Yang, Yuansheng.(2021).Analysis on the key role in corrosion behavior of CoCrNiAlTi-based high entropy alloy.MATERIALS CHEMISTRY AND PHYSICS,259,9.
MLA Huang, Lei,et al."Analysis on the key role in corrosion behavior of CoCrNiAlTi-based high entropy alloy".MATERIALS CHEMISTRY AND PHYSICS 259(2021):9.
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