Low-density NiAlFeCrMoV eutectic high-entropy alloys with excellent mechanical and wear properties
Eutectic high-entropy alloys (EHEAs) have become a new research frontier and hot topic in the metallic materials community in recent years because of their excellent mechanical properties and great potential in practical engineering applications. In this work, a series of novel low-density (NiAl)100...
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Elsevier
2022-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S223878542201804X |
| _version_ | 1798006058642309120 |
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| author | Yake Xiao Xiangpeng Chang Xianghe Peng |
| author_facet | Yake Xiao Xiangpeng Chang Xianghe Peng |
| author_sort | Yake Xiao |
| collection | DOAJ |
| description | Eutectic high-entropy alloys (EHEAs) have become a new research frontier and hot topic in the metallic materials community in recent years because of their excellent mechanical properties and great potential in practical engineering applications. In this work, a series of novel low-density (NiAl)100-x(FeCrMoV)x (x = 35, 40 and 45) EHEAs were designed and successfully prepared with arc-melting method. Their phase constitution, microstructure, mechanical and wear properties, as well as the deformation mechanisms were systematically investigated. It was shown that all the EHEAs are composed of BCC and B2 phases and their densities are less than 7 g/cm3. Typical hypoeutectic, eutectic and hypereutectic microstructures could be achieved as x = 35, 40 and 45, respectively. Significantly, as x = 45 the EHEA with hypereutectic microstructure possesses the best mechanical and wear properties at room temperature, of which the true and ultimate compressive yield stresses reach 1695.4 MPa and 2500.2 MPa, and the fracture strain and wear rate can reach 28.5% and 7.267 × 10−6 mm3N−1m−1, respectively, better than most HEAs reported previously. The excellent mechanical and wear properties can mainly be attributed to the small lattice mismatch between the BCC and B2 phases and the high hardness of the alloy. This work is significant because it could provide guidance for the design of high-performance alloys for practical engineering applications. |
| first_indexed | 2024-04-11T12:49:22Z |
| format | Article |
| id | doaj.art-c706f8ce37da4f4eaa79c2f97b73f8ba |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-11T12:49:22Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-c706f8ce37da4f4eaa79c2f97b73f8ba2022-12-22T04:23:15ZengElsevierJournal of Materials Research and Technology2238-78542022-11-012149084920Low-density NiAlFeCrMoV eutectic high-entropy alloys with excellent mechanical and wear propertiesYake Xiao0Xiangpeng Chang1Xianghe Peng2Department of Engineering Mechanics, Chongqing University, Chongqing, 400044, ChinaCollege of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, ChinaDepartment of Engineering Mechanics, Chongqing University, Chongqing, 400044, China; State Key Laboratory of Coal Mining Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China; Corresponding author. Department of Engineering Mechanics, Chongqing University, Chongqing, 400044, China.Eutectic high-entropy alloys (EHEAs) have become a new research frontier and hot topic in the metallic materials community in recent years because of their excellent mechanical properties and great potential in practical engineering applications. In this work, a series of novel low-density (NiAl)100-x(FeCrMoV)x (x = 35, 40 and 45) EHEAs were designed and successfully prepared with arc-melting method. Their phase constitution, microstructure, mechanical and wear properties, as well as the deformation mechanisms were systematically investigated. It was shown that all the EHEAs are composed of BCC and B2 phases and their densities are less than 7 g/cm3. Typical hypoeutectic, eutectic and hypereutectic microstructures could be achieved as x = 35, 40 and 45, respectively. Significantly, as x = 45 the EHEA with hypereutectic microstructure possesses the best mechanical and wear properties at room temperature, of which the true and ultimate compressive yield stresses reach 1695.4 MPa and 2500.2 MPa, and the fracture strain and wear rate can reach 28.5% and 7.267 × 10−6 mm3N−1m−1, respectively, better than most HEAs reported previously. The excellent mechanical and wear properties can mainly be attributed to the small lattice mismatch between the BCC and B2 phases and the high hardness of the alloy. This work is significant because it could provide guidance for the design of high-performance alloys for practical engineering applications.http://www.sciencedirect.com/science/article/pii/S223878542201804XEutectic high-entropy alloysMicrostructure evolutionMechanical propertiesWear propertiesDeformation mechanisms |
| spellingShingle | Yake Xiao Xiangpeng Chang Xianghe Peng Low-density NiAlFeCrMoV eutectic high-entropy alloys with excellent mechanical and wear properties Journal of Materials Research and Technology Eutectic high-entropy alloys Microstructure evolution Mechanical properties Wear properties Deformation mechanisms |
| title | Low-density NiAlFeCrMoV eutectic high-entropy alloys with excellent mechanical and wear properties |
| title_full | Low-density NiAlFeCrMoV eutectic high-entropy alloys with excellent mechanical and wear properties |
| title_fullStr | Low-density NiAlFeCrMoV eutectic high-entropy alloys with excellent mechanical and wear properties |
| title_full_unstemmed | Low-density NiAlFeCrMoV eutectic high-entropy alloys with excellent mechanical and wear properties |
| title_short | Low-density NiAlFeCrMoV eutectic high-entropy alloys with excellent mechanical and wear properties |
| title_sort | low density nialfecrmov eutectic high entropy alloys with excellent mechanical and wear properties |
| topic | Eutectic high-entropy alloys Microstructure evolution Mechanical properties Wear properties Deformation mechanisms |
| url | http://www.sciencedirect.com/science/article/pii/S223878542201804X |
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