| 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 Author | Wang, Changzheng(wangchangzheng@lcu.edu.cn) |
| 2021-02-01 | |
| Source Publication | MATERIALS CHEMISTRY AND PHYSICS
 |
| ISSN | 0254-0584 |
| Volume | 259Pages:9 |
| Abstract | In 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. |
| Keyword | High entropy alloys Corrosion behavior Microstructure Chemical composition |
| Funding Organization | Nature Science Foundation of Shandong Province |
| DOI | 10.1016/j.matchemphys.2020.124007 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Nature Science Foundation of Shandong Province[ZR2018MEM005.D: \MYFILES\ELSEVIER\MAC\00124007\SCE\gs1] |
| WOS Research Area | Materials Science |
| WOS Subject | Materials Science, Multidisciplinary |
| WOS ID | WOS:000615731100001 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/160445 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Wang, Changzheng |
| Affiliation | 1.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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