A comparative study on nanoscale mechanical properties of CrMnFeCoNi high-entropy alloys fabricated by casting and additive manufacturing
Additive manufacturing (AM) has emerged as a pioneering method for fabricating high entropy alloys (HEAs), yet a comprehensive comparison of their nanoscale mechanical properties with those produced by the conventional casting method remains unexplored. In this study, the nanoindentation was utilize...
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424021513 |
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| author | Siqi Liu Di Wan Shuai Guan Yuequn Fu Zhiliang Zhang Jianying He |
| author_facet | Siqi Liu Di Wan Shuai Guan Yuequn Fu Zhiliang Zhang Jianying He |
| author_sort | Siqi Liu |
| collection | DOAJ |
| description | Additive manufacturing (AM) has emerged as a pioneering method for fabricating high entropy alloys (HEAs), yet a comprehensive comparison of their nanoscale mechanical properties with those produced by the conventional casting method remains unexplored. In this study, the nanoindentation was utilized to investigate the nanoscale elastic and plastic characteristics in both additive-manufactured (AM-ed) and as-casted single-phase face-centered cubic (FCC) equiatomic CrMnFeCoNi HEAs. Herein, the hardness, reduced modulus, indentation size effect (ISE), yield strength, fracture toughness, and strain rate sensitivity were comprehensively investigated. The results indicated that the hardness of AM-ed HEA was higher than the as-casted HEA, and the reduced modulus values showed no notable distinction between the two samples. The AM-ed HEA demonstrated simultaneous enhancements in yield strength and fracture toughness compared to the as-casted HEA. The as-casted HEA possessed a more distinct indentation size effect (ISE) than the AM-ed HEA. It was observed that the AM-ed HEA exhibited relatively lower strain rate sensitivity and a larger activation volume. This direct comparison of the mechanical properties and deformation mechanisms from a nanoscale view offers unique insights for optimizing and advancing AM techniques in the fabrication of HEAs. |
| format | Article |
| id | doaj-art-8567ec34cd2548c0b8b6e18c44ef95a8 |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-8567ec34cd2548c0b8b6e18c44ef95a82025-08-20T02:35:33ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01331211121910.1016/j.jmrt.2024.09.146A comparative study on nanoscale mechanical properties of CrMnFeCoNi high-entropy alloys fabricated by casting and additive manufacturingSiqi Liu0Di Wan1Shuai Guan2Yuequn Fu3Zhiliang Zhang4Jianying He5NTNU Nanomechanical Lab, Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, 7491, NorwayAdvanced Research Institute of Multidisciplinary Sciences, Beijing Institute of Technology, Zhongguancun South Street 5, 100081, Beijing, ChinaDepartment of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA, 01002, United StatesPoreLab, The Njord Centre, Department of Physics, University of Oslo, Oslo, 0316, NorwayNTNU Nanomechanical Lab, Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, 7491, NorwayNTNU Nanomechanical Lab, Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, 7491, Norway; Corresponding author.Additive manufacturing (AM) has emerged as a pioneering method for fabricating high entropy alloys (HEAs), yet a comprehensive comparison of their nanoscale mechanical properties with those produced by the conventional casting method remains unexplored. In this study, the nanoindentation was utilized to investigate the nanoscale elastic and plastic characteristics in both additive-manufactured (AM-ed) and as-casted single-phase face-centered cubic (FCC) equiatomic CrMnFeCoNi HEAs. Herein, the hardness, reduced modulus, indentation size effect (ISE), yield strength, fracture toughness, and strain rate sensitivity were comprehensively investigated. The results indicated that the hardness of AM-ed HEA was higher than the as-casted HEA, and the reduced modulus values showed no notable distinction between the two samples. The AM-ed HEA demonstrated simultaneous enhancements in yield strength and fracture toughness compared to the as-casted HEA. The as-casted HEA possessed a more distinct indentation size effect (ISE) than the AM-ed HEA. It was observed that the AM-ed HEA exhibited relatively lower strain rate sensitivity and a larger activation volume. This direct comparison of the mechanical properties and deformation mechanisms from a nanoscale view offers unique insights for optimizing and advancing AM techniques in the fabrication of HEAs.http://www.sciencedirect.com/science/article/pii/S2238785424021513High-entropy alloysAdditive manufacturingNanoindentationIndentation size effectYield strengthFracture toughness |
| spellingShingle | Siqi Liu Di Wan Shuai Guan Yuequn Fu Zhiliang Zhang Jianying He A comparative study on nanoscale mechanical properties of CrMnFeCoNi high-entropy alloys fabricated by casting and additive manufacturing Journal of Materials Research and Technology High-entropy alloys Additive manufacturing Nanoindentation Indentation size effect Yield strength Fracture toughness |
| title | A comparative study on nanoscale mechanical properties of CrMnFeCoNi high-entropy alloys fabricated by casting and additive manufacturing |
| title_full | A comparative study on nanoscale mechanical properties of CrMnFeCoNi high-entropy alloys fabricated by casting and additive manufacturing |
| title_fullStr | A comparative study on nanoscale mechanical properties of CrMnFeCoNi high-entropy alloys fabricated by casting and additive manufacturing |
| title_full_unstemmed | A comparative study on nanoscale mechanical properties of CrMnFeCoNi high-entropy alloys fabricated by casting and additive manufacturing |
| title_short | A comparative study on nanoscale mechanical properties of CrMnFeCoNi high-entropy alloys fabricated by casting and additive manufacturing |
| title_sort | comparative study on nanoscale mechanical properties of crmnfeconi high entropy alloys fabricated by casting and additive manufacturing |
| topic | High-entropy alloys Additive manufacturing Nanoindentation Indentation size effect Yield strength Fracture toughness |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424021513 |
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