Superior strength-ductility combination of a Co-rich CoCrNiAlTi high-entropy alloy at room and cryogenic temperatures
In the present study, a Co-rich CoCrNi-AlTi high-entropy alloy was designed and fabricated by hot forging and 700 °C for 8 h annealing process. The microstructure of the resultant alloy was composed of three multicomponent-phases with the face-centered cubic (FCC) structure, hexagonal close-packed (...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/ab7a64 |
| _version_ | 1797746516228571136 |
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| author | X H Du X F Huo H T Chang W P Li G S Duan J C Huang B L Wu N F Zou L Zhang |
| author_facet | X H Du X F Huo H T Chang W P Li G S Duan J C Huang B L Wu N F Zou L Zhang |
| author_sort | X H Du |
| collection | DOAJ |
| description | In the present study, a Co-rich CoCrNi-AlTi high-entropy alloy was designed and fabricated by hot forging and 700 °C for 8 h annealing process. The microstructure of the resultant alloy was composed of three multicomponent-phases with the face-centered cubic (FCC) structure, hexagonal close-packed (HCP) structure and L1 _2 structure, respectively. The alloy exhibited a remarkable combination of tensile yield strength (gigapascal scale) and plasticity (uniform strain over 30%) at both room and cryogenic temperatures. The cooperative operation of multiple mechanisms consisting of refined-grain strengthening, second-phase strengthening, precipitation strengthening, stacking faults and phase-transformation toughening was suggested to be responsible for the excellent mechanical response. |
| first_indexed | 2024-03-12T15:37:56Z |
| format | Article |
| id | doaj.art-0eb5c31711914818b5df6f0c180beb2c |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:37:56Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-0eb5c31711914818b5df6f0c180beb2c2023-08-09T16:05:36ZengIOP PublishingMaterials Research Express2053-15912020-01-017303400110.1088/2053-1591/ab7a64Superior strength-ductility combination of a Co-rich CoCrNiAlTi high-entropy alloy at room and cryogenic temperaturesX H Du0https://orcid.org/0000-0003-0236-9293X F Huo1H T Chang2W P Li3G S Duan4J C Huang5B L Wu6N F Zou7L Zhang8School of Materials Science & Engineering, Shenyang Aerospace University , Shenyang, People’s Republic of ChinaSchool of Materials Science & Engineering, Shenyang Aerospace University , Shenyang, People’s Republic of ChinaSchool of Materials Science & Engineering, Shenyang Aerospace University , Shenyang, People’s Republic of ChinaDepartment of Materials Science & Engineering, City University of Hong Kong , Kowloon, Hong Kong Special Administrative Region of ChinaSchool of Materials Science & Engineering, Shenyang Aerospace University , Shenyang, People’s Republic of ChinaDepartment of Materials Science & Engineering, City University of Hong Kong , Kowloon, Hong Kong Special Administrative Region of ChinaSchool of Materials Science & Engineering, Shenyang Aerospace University , Shenyang, People’s Republic of ChinaSchool of Materials Science & Engineering, Shenyang Aerospace University , Shenyang, People’s Republic of ChinaSchool of Materials Science & Engineering, Shenyang Aerospace University , Shenyang, People’s Republic of ChinaIn the present study, a Co-rich CoCrNi-AlTi high-entropy alloy was designed and fabricated by hot forging and 700 °C for 8 h annealing process. The microstructure of the resultant alloy was composed of three multicomponent-phases with the face-centered cubic (FCC) structure, hexagonal close-packed (HCP) structure and L1 _2 structure, respectively. The alloy exhibited a remarkable combination of tensile yield strength (gigapascal scale) and plasticity (uniform strain over 30%) at both room and cryogenic temperatures. The cooperative operation of multiple mechanisms consisting of refined-grain strengthening, second-phase strengthening, precipitation strengthening, stacking faults and phase-transformation toughening was suggested to be responsible for the excellent mechanical response.https://doi.org/10.1088/2053-1591/ab7a64high-entropy alloysmultiple-phase microstructuremechanical propertiesstrengthening and toughening mechanisms |
| spellingShingle | X H Du X F Huo H T Chang W P Li G S Duan J C Huang B L Wu N F Zou L Zhang Superior strength-ductility combination of a Co-rich CoCrNiAlTi high-entropy alloy at room and cryogenic temperatures Materials Research Express high-entropy alloys multiple-phase microstructure mechanical properties strengthening and toughening mechanisms |
| title | Superior strength-ductility combination of a Co-rich CoCrNiAlTi high-entropy alloy at room and cryogenic temperatures |
| title_full | Superior strength-ductility combination of a Co-rich CoCrNiAlTi high-entropy alloy at room and cryogenic temperatures |
| title_fullStr | Superior strength-ductility combination of a Co-rich CoCrNiAlTi high-entropy alloy at room and cryogenic temperatures |
| title_full_unstemmed | Superior strength-ductility combination of a Co-rich CoCrNiAlTi high-entropy alloy at room and cryogenic temperatures |
| title_short | Superior strength-ductility combination of a Co-rich CoCrNiAlTi high-entropy alloy at room and cryogenic temperatures |
| title_sort | superior strength ductility combination of a co rich cocrnialti high entropy alloy at room and cryogenic temperatures |
| topic | high-entropy alloys multiple-phase microstructure mechanical properties strengthening and toughening mechanisms |
| url | https://doi.org/10.1088/2053-1591/ab7a64 |
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