Insight of novel CoCrFeMnNi–Al2O3p high entropy alloy matrix composites by mechanical alloying and spark plasma sintering
In the present work, novel nano-Al2O3p reinforced heterogeneous CoCrFeMnNi matrix composites with 0–7.5 wt% Al2O3p were fabricated by mechanical alloying (MA) and spark plasma sintering (SPS) method. The microstructure evolution and properties, i.e., density, hardness and room temperature compressio...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S223878542302046X |
| _version_ | 1797646645354037248 |
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| author | Pan Dai Ao Li Tao Tu Lin Yang Xian Luo Chen Wang Xianghong Lv |
| author_facet | Pan Dai Ao Li Tao Tu Lin Yang Xian Luo Chen Wang Xianghong Lv |
| author_sort | Pan Dai |
| collection | DOAJ |
| description | In the present work, novel nano-Al2O3p reinforced heterogeneous CoCrFeMnNi matrix composites with 0–7.5 wt% Al2O3p were fabricated by mechanical alloying (MA) and spark plasma sintering (SPS) method. The microstructure evolution and properties, i.e., density, hardness and room temperature compression were systematically studied. The results show that different degrees of heterogeneous matrix organization occurred in the composites. The CoCrFeMnNi-2.5 wt%Al2O3p composite consists of CG region and UFG region of uniformly distributed nano-Al2O3p. And the addition of nano-Al2O3p can effectively refine the matrix grains. Compared to pure HEA, the grain size of CoCrFeMnNi-5.0 wt%Al2O3p composite is refined by 48.5%. With the increase of nano-Al2O3 content, the hardness values of the composites increased by 23.6%–56.7% than those of pure HEA. Among the nanocomposites, the CoCrFeMnNi-5.0 wt%Al2O3p composite exhibits the best strengthening effect, while the CoCrFeMnNi-2.5 wt%Al2O3p composite shows a superior strong-plastic synergistic effect with yield strength, ultimate compressive strength and fracture strain of 913 MPa, 1935 MPa and 38%, respectively. However, with the Al2O3p content further increases to 7.5 wt%, both the strength and plasticity of the composite decrease due to the serious agglomeration of nanoparticles. |
| first_indexed | 2024-03-11T15:05:41Z |
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| id | doaj.art-582fe797e9ca440896748ef17dd9d0c0 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:05:41Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-582fe797e9ca440896748ef17dd9d0c02023-10-30T06:03:56ZengElsevierJournal of Materials Research and Technology2238-78542023-09-012648714886Insight of novel CoCrFeMnNi–Al2O3p high entropy alloy matrix composites by mechanical alloying and spark plasma sinteringPan Dai0Ao Li1Tao Tu2Lin Yang3Xian Luo4Chen Wang5Xianghong Lv6School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, P.R. China; Corresponding author.School of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, P.R. ChinaXi'an Shechtman Nobel Prize New Materials Institute Co., Ltd, Xi'an 710048, P.R. China; Corresponding author.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, P.R. ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, P.R. ChinaSchool of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, P.R. ChinaSchool of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, P.R. ChinaIn the present work, novel nano-Al2O3p reinforced heterogeneous CoCrFeMnNi matrix composites with 0–7.5 wt% Al2O3p were fabricated by mechanical alloying (MA) and spark plasma sintering (SPS) method. The microstructure evolution and properties, i.e., density, hardness and room temperature compression were systematically studied. The results show that different degrees of heterogeneous matrix organization occurred in the composites. The CoCrFeMnNi-2.5 wt%Al2O3p composite consists of CG region and UFG region of uniformly distributed nano-Al2O3p. And the addition of nano-Al2O3p can effectively refine the matrix grains. Compared to pure HEA, the grain size of CoCrFeMnNi-5.0 wt%Al2O3p composite is refined by 48.5%. With the increase of nano-Al2O3 content, the hardness values of the composites increased by 23.6%–56.7% than those of pure HEA. Among the nanocomposites, the CoCrFeMnNi-5.0 wt%Al2O3p composite exhibits the best strengthening effect, while the CoCrFeMnNi-2.5 wt%Al2O3p composite shows a superior strong-plastic synergistic effect with yield strength, ultimate compressive strength and fracture strain of 913 MPa, 1935 MPa and 38%, respectively. However, with the Al2O3p content further increases to 7.5 wt%, both the strength and plasticity of the composite decrease due to the serious agglomeration of nanoparticles.http://www.sciencedirect.com/science/article/pii/S223878542302046XCoCrFeMnNiHigh-entropy alloyAl2O3 nanoparticlesMicrostructure |
| spellingShingle | Pan Dai Ao Li Tao Tu Lin Yang Xian Luo Chen Wang Xianghong Lv Insight of novel CoCrFeMnNi–Al2O3p high entropy alloy matrix composites by mechanical alloying and spark plasma sintering Journal of Materials Research and Technology CoCrFeMnNi High-entropy alloy Al2O3 nanoparticles Microstructure |
| title | Insight of novel CoCrFeMnNi–Al2O3p high entropy alloy matrix composites by mechanical alloying and spark plasma sintering |
| title_full | Insight of novel CoCrFeMnNi–Al2O3p high entropy alloy matrix composites by mechanical alloying and spark plasma sintering |
| title_fullStr | Insight of novel CoCrFeMnNi–Al2O3p high entropy alloy matrix composites by mechanical alloying and spark plasma sintering |
| title_full_unstemmed | Insight of novel CoCrFeMnNi–Al2O3p high entropy alloy matrix composites by mechanical alloying and spark plasma sintering |
| title_short | Insight of novel CoCrFeMnNi–Al2O3p high entropy alloy matrix composites by mechanical alloying and spark plasma sintering |
| title_sort | insight of novel cocrfemnni al2o3p high entropy alloy matrix composites by mechanical alloying and spark plasma sintering |
| topic | CoCrFeMnNi High-entropy alloy Al2O3 nanoparticles Microstructure |
| url | http://www.sciencedirect.com/science/article/pii/S223878542302046X |
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