Study on the continuous phase evolution and physical properties of gas-atomized high-entropy alloy powders
In this study, AlCoCrFeNi high entropy alloy (HEA) powders were fabricated by gas atomization process, and the effects of annealing heat treatment on phase evolution and mechanical properties were investigated. The as-atomized powders have pure BCC phase with a spherical shape and equal composition...
| 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 |
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| Online Access: | https://doi.org/10.1088/2053-1591/ab5ee2 |
| _version_ | 1797747122233147392 |
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| author | Jui-Ting Liang Kuei-Chung Cheng Shih-Hsun Chen Jing-Han Chen Shane Stadler Chia-Lin Li Chun-Hway Hsueh |
| author_facet | Jui-Ting Liang Kuei-Chung Cheng Shih-Hsun Chen Jing-Han Chen Shane Stadler Chia-Lin Li Chun-Hway Hsueh |
| author_sort | Jui-Ting Liang |
| collection | DOAJ |
| description | In this study, AlCoCrFeNi high entropy alloy (HEA) powders were fabricated by gas atomization process, and the effects of annealing heat treatment on phase evolution and mechanical properties were investigated. The as-atomized powders have pure BCC phase with a spherical shape and equal composition distribution, and then the FCC and sigma phase sequentially generated after annealing. The mechanical property such as hardness was evidently enhanced, which was caused by precipitation hardening effect. After the raw powders were annealed at 600 °C, the FCC (Al–Ni) phase began to precipitate, the its phase intensity raised with the annealing temperature. Then, the sigma phase (Fe–Cr) formed as the annealing temperature reached 800 °C. Both mechanical properties and lattice constant were influenced by heating effect. According to the results, the lattice became loose with the increasing temperature. In summary, the mechanical properties and phase constitutions of gas-atomized AlCoCrFeNi HEA powders can be adjusted via annealing process, resulting in precipitation hardening effect. |
| first_indexed | 2024-03-12T15:46:39Z |
| format | Article |
| id | doaj.art-10cc48b3007f43d5b3aee709aac05899 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:46:39Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-10cc48b3007f43d5b3aee709aac058992023-08-09T15:22:54ZengIOP PublishingMaterials Research Express2053-15912020-01-017202654510.1088/2053-1591/ab5ee2Study on the continuous phase evolution and physical properties of gas-atomized high-entropy alloy powdersJui-Ting Liang0Kuei-Chung Cheng1Shih-Hsun Chen2https://orcid.org/0000-0002-5750-6470Jing-Han Chen3Shane Stadler4Chia-Lin Li5Chun-Hway Hsueh6Department of Mechanical Engineering, National Taiwan University of Science and Technology , Taipei, 10607, TaiwanDepartment of Mechanical Engineering, National Taiwan University of Science and Technology , Taipei, 10607, TaiwanDepartment of Mechanical Engineering, National Taiwan University of Science and Technology , Taipei, 10607, TaiwanDepartment of Physics and Astronomy, Louisiana State University , Baton Rouge, Louisiana 70803, United States of AmericaDepartment of Physics and Astronomy, Louisiana State University , Baton Rouge, Louisiana 70803, United States of AmericaDepartment of Materials Science and Engineering, National Taiwan University , Taipei, 10607, TaiwanDepartment of Materials Science and Engineering, National Taiwan University , Taipei, 10607, TaiwanIn this study, AlCoCrFeNi high entropy alloy (HEA) powders were fabricated by gas atomization process, and the effects of annealing heat treatment on phase evolution and mechanical properties were investigated. The as-atomized powders have pure BCC phase with a spherical shape and equal composition distribution, and then the FCC and sigma phase sequentially generated after annealing. The mechanical property such as hardness was evidently enhanced, which was caused by precipitation hardening effect. After the raw powders were annealed at 600 °C, the FCC (Al–Ni) phase began to precipitate, the its phase intensity raised with the annealing temperature. Then, the sigma phase (Fe–Cr) formed as the annealing temperature reached 800 °C. Both mechanical properties and lattice constant were influenced by heating effect. According to the results, the lattice became loose with the increasing temperature. In summary, the mechanical properties and phase constitutions of gas-atomized AlCoCrFeNi HEA powders can be adjusted via annealing process, resulting in precipitation hardening effect.https://doi.org/10.1088/2053-1591/ab5ee2high entropy alloysgas atomizationannealingAlCoCrFeNiprecipitation hardening |
| spellingShingle | Jui-Ting Liang Kuei-Chung Cheng Shih-Hsun Chen Jing-Han Chen Shane Stadler Chia-Lin Li Chun-Hway Hsueh Study on the continuous phase evolution and physical properties of gas-atomized high-entropy alloy powders Materials Research Express high entropy alloys gas atomization annealing AlCoCrFeNi precipitation hardening |
| title | Study on the continuous phase evolution and physical properties of gas-atomized high-entropy alloy powders |
| title_full | Study on the continuous phase evolution and physical properties of gas-atomized high-entropy alloy powders |
| title_fullStr | Study on the continuous phase evolution and physical properties of gas-atomized high-entropy alloy powders |
| title_full_unstemmed | Study on the continuous phase evolution and physical properties of gas-atomized high-entropy alloy powders |
| title_short | Study on the continuous phase evolution and physical properties of gas-atomized high-entropy alloy powders |
| title_sort | study on the continuous phase evolution and physical properties of gas atomized high entropy alloy powders |
| topic | high entropy alloys gas atomization annealing AlCoCrFeNi precipitation hardening |
| url | https://doi.org/10.1088/2053-1591/ab5ee2 |
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