Mechanical properties and corrosion resistance of AlxCoCuFeMn high-entropy alloys
In the engineering application of alloys as structural materials, the mechanical properties and corrosion resistance are the key factors that need to be considered, and which are closely related to the microstructure. The effects of Al on the microstructure, mechanical properties and corrosion resis...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423008104 |
| _version_ | 1797798827347935232 |
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| author | Yingren Yan Liyang Fang Yongkang Tan Xiaoma Tao Yifang Ouyang Yong Du |
| author_facet | Yingren Yan Liyang Fang Yongkang Tan Xiaoma Tao Yifang Ouyang Yong Du |
| author_sort | Yingren Yan |
| collection | DOAJ |
| description | In the engineering application of alloys as structural materials, the mechanical properties and corrosion resistance are the key factors that need to be considered, and which are closely related to the microstructure. The effects of Al on the microstructure, mechanical properties and corrosion resistance of AlxCoCuFeMn (x = 0, 0.25, 0.5, 0.75, 1) high-entropy alloys (HEAs) have been investigated in the present work. The results indicate AlxCoCuFeMn HEAs have a typical dendritic structure, the Al free CoCuFeMn HEA has a Cu-rich FCC1 phase in interdendrites region and a Fe–Co rich FCC2 phase in dendrite region. When the content of Al increases, the fraction of FCC1 phase precipitated in the dendrite region, the FCC2 phase gradually developed into BCC&B2 phases, and finally only FCC1 and BCC&B2 phases were left in AlCoCuFeMn. With increasing of Al contents, the hardness and compressive yield strength of HEAs increased monotonically from 175 HV, 434 MPa to 463 HV, 1342 MPa, respectively. Meanwhile, the mass density decreased from 7.94 g/cm3 to 6.99 g/cm3 with increasing Al contents. The corrosion resistance of HEAs are ameliorated as the Al content increased. Among the five HEAs, AlCoCuFeMn shows remarkable comprehensive corrosion resistance, for which, the Ecorr and Icorr values are found to be −0.342 V and 5.53 × 10−6 A cm−2. The results of present study are useful to design low-cost corrosion-resistant HEAs with high strength. |
| first_indexed | 2024-03-13T04:09:44Z |
| format | Article |
| id | doaj.art-c93c5cf203e44ef8b414ece7ca3612db |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-13T04:09:44Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-c93c5cf203e44ef8b414ece7ca3612db2023-06-21T06:56:49ZengElsevierJournal of Materials Research and Technology2238-78542023-05-012452505259Mechanical properties and corrosion resistance of AlxCoCuFeMn high-entropy alloysYingren Yan0Liyang Fang1Yongkang Tan2Xiaoma Tao3Yifang Ouyang4Yong Du5State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning 530004, ChinaState Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning 530004, ChinaState Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning 530004, ChinaState Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning 530004, ChinaState Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning 530004, China; Corresponding author.State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaIn the engineering application of alloys as structural materials, the mechanical properties and corrosion resistance are the key factors that need to be considered, and which are closely related to the microstructure. The effects of Al on the microstructure, mechanical properties and corrosion resistance of AlxCoCuFeMn (x = 0, 0.25, 0.5, 0.75, 1) high-entropy alloys (HEAs) have been investigated in the present work. The results indicate AlxCoCuFeMn HEAs have a typical dendritic structure, the Al free CoCuFeMn HEA has a Cu-rich FCC1 phase in interdendrites region and a Fe–Co rich FCC2 phase in dendrite region. When the content of Al increases, the fraction of FCC1 phase precipitated in the dendrite region, the FCC2 phase gradually developed into BCC&B2 phases, and finally only FCC1 and BCC&B2 phases were left in AlCoCuFeMn. With increasing of Al contents, the hardness and compressive yield strength of HEAs increased monotonically from 175 HV, 434 MPa to 463 HV, 1342 MPa, respectively. Meanwhile, the mass density decreased from 7.94 g/cm3 to 6.99 g/cm3 with increasing Al contents. The corrosion resistance of HEAs are ameliorated as the Al content increased. Among the five HEAs, AlCoCuFeMn shows remarkable comprehensive corrosion resistance, for which, the Ecorr and Icorr values are found to be −0.342 V and 5.53 × 10−6 A cm−2. The results of present study are useful to design low-cost corrosion-resistant HEAs with high strength.http://www.sciencedirect.com/science/article/pii/S2238785423008104High entropy alloysAlCoCuFeMnMechanical propertiesCorrosion resistance |
| spellingShingle | Yingren Yan Liyang Fang Yongkang Tan Xiaoma Tao Yifang Ouyang Yong Du Mechanical properties and corrosion resistance of AlxCoCuFeMn high-entropy alloys Journal of Materials Research and Technology High entropy alloys AlCoCuFeMn Mechanical properties Corrosion resistance |
| title | Mechanical properties and corrosion resistance of AlxCoCuFeMn high-entropy alloys |
| title_full | Mechanical properties and corrosion resistance of AlxCoCuFeMn high-entropy alloys |
| title_fullStr | Mechanical properties and corrosion resistance of AlxCoCuFeMn high-entropy alloys |
| title_full_unstemmed | Mechanical properties and corrosion resistance of AlxCoCuFeMn high-entropy alloys |
| title_short | Mechanical properties and corrosion resistance of AlxCoCuFeMn high-entropy alloys |
| title_sort | mechanical properties and corrosion resistance of alxcocufemn high entropy alloys |
| topic | High entropy alloys AlCoCuFeMn Mechanical properties Corrosion resistance |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423008104 |
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