Effect of particle content on microstructure and deformation mechanism of in-situ Al2O3p/Al0.25CoCrFeNi high entropy alloy matrix composites
The strength-ductility trade-off is a common dilemma in the field of high entropy alloys (HEAs). Incorporating reinforcement particles into HEAs to form HEA matrix composites (HEAMCs) has become an effective method to alleviate this problem. In this work, the in-situ nano (Al2O3p)x/Al0.25CoCrFeNi (x...
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Elsevier
2025-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425007343 |
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| author | Tuo Xu Wenchen Zhuang Suhui Meng Zheng Ma Li Jiang Tongmin Wang Zhiqiang Cao |
| author_facet | Tuo Xu Wenchen Zhuang Suhui Meng Zheng Ma Li Jiang Tongmin Wang Zhiqiang Cao |
| author_sort | Tuo Xu |
| collection | DOAJ |
| description | The strength-ductility trade-off is a common dilemma in the field of high entropy alloys (HEAs). Incorporating reinforcement particles into HEAs to form HEA matrix composites (HEAMCs) has become an effective method to alleviate this problem. In this work, the in-situ nano (Al2O3p)x/Al0.25CoCrFeNi (x = 0.3–6.0 vol%) composites were prepared by vacuum arc melting, followed by cold rolling and annealing. The effects of particulate content on the microstructures and mechanical properties of the new HEAMCs were investigated. It is found that the Al2O3p/Al0.25CoCrFeNi composites consist of a face-centered cubic (FCC) phase with nano Al2O3 particles embedded. When the particulate content is lower than 0.9 vol%, the Al2O3 particles are uniformly distributed without obvious agglomeration and exhibit spherical or polygonal shapes with sizes below 100 nm. The 0.8 vol% Al2O3 HEAMC exhibits the best mechanical properties with tensile yield strength (YS), ultimate tensile strength (UTS) and elongation (EL) of 346 MPa, 629 MPa and 58.0 %, respectively, increased by 18.1 %, 5.4 % and 3.9 %, compared to Al0.25CoCrFeNi HEA. The simultaneous improvement of strength and plasticity in the 0.8 vol% Al2O3 HEAMC can be attributed to the activation of 2nd twin by the particle-induced strengthening effect, resulting in a higher twin density in the HEAMC. |
| format | Article |
| id | doaj-art-a67f61d95fbf47949ef65027750bd7c9 |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-a67f61d95fbf47949ef65027750bd7c92025-08-20T02:10:20ZengElsevierJournal of Materials Research and Technology2238-78542025-05-01361835184710.1016/j.jmrt.2025.03.224Effect of particle content on microstructure and deformation mechanism of in-situ Al2O3p/Al0.25CoCrFeNi high entropy alloy matrix compositesTuo Xu0Wenchen Zhuang1Suhui Meng2Zheng Ma3Li Jiang4Tongmin Wang5Zhiqiang Cao6Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, ChinaKey Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, ChinaKey Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, ChinaKey Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, ChinaKey Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, ChinaNingbo Research Institute of Dalian University of Technology, Ningbo, 315000, China; Corresponding author.Ningbo Research Institute of Dalian University of Technology, Ningbo, 315000, China; Corresponding author.The strength-ductility trade-off is a common dilemma in the field of high entropy alloys (HEAs). Incorporating reinforcement particles into HEAs to form HEA matrix composites (HEAMCs) has become an effective method to alleviate this problem. In this work, the in-situ nano (Al2O3p)x/Al0.25CoCrFeNi (x = 0.3–6.0 vol%) composites were prepared by vacuum arc melting, followed by cold rolling and annealing. The effects of particulate content on the microstructures and mechanical properties of the new HEAMCs were investigated. It is found that the Al2O3p/Al0.25CoCrFeNi composites consist of a face-centered cubic (FCC) phase with nano Al2O3 particles embedded. When the particulate content is lower than 0.9 vol%, the Al2O3 particles are uniformly distributed without obvious agglomeration and exhibit spherical or polygonal shapes with sizes below 100 nm. The 0.8 vol% Al2O3 HEAMC exhibits the best mechanical properties with tensile yield strength (YS), ultimate tensile strength (UTS) and elongation (EL) of 346 MPa, 629 MPa and 58.0 %, respectively, increased by 18.1 %, 5.4 % and 3.9 %, compared to Al0.25CoCrFeNi HEA. The simultaneous improvement of strength and plasticity in the 0.8 vol% Al2O3 HEAMC can be attributed to the activation of 2nd twin by the particle-induced strengthening effect, resulting in a higher twin density in the HEAMC.http://www.sciencedirect.com/science/article/pii/S2238785425007343High entropy alloy matrix compositesIn-situ synthesisMechanical propertiesStrength and ductility |
| spellingShingle | Tuo Xu Wenchen Zhuang Suhui Meng Zheng Ma Li Jiang Tongmin Wang Zhiqiang Cao Effect of particle content on microstructure and deformation mechanism of in-situ Al2O3p/Al0.25CoCrFeNi high entropy alloy matrix composites Journal of Materials Research and Technology High entropy alloy matrix composites In-situ synthesis Mechanical properties Strength and ductility |
| title | Effect of particle content on microstructure and deformation mechanism of in-situ Al2O3p/Al0.25CoCrFeNi high entropy alloy matrix composites |
| title_full | Effect of particle content on microstructure and deformation mechanism of in-situ Al2O3p/Al0.25CoCrFeNi high entropy alloy matrix composites |
| title_fullStr | Effect of particle content on microstructure and deformation mechanism of in-situ Al2O3p/Al0.25CoCrFeNi high entropy alloy matrix composites |
| title_full_unstemmed | Effect of particle content on microstructure and deformation mechanism of in-situ Al2O3p/Al0.25CoCrFeNi high entropy alloy matrix composites |
| title_short | Effect of particle content on microstructure and deformation mechanism of in-situ Al2O3p/Al0.25CoCrFeNi high entropy alloy matrix composites |
| title_sort | effect of particle content on microstructure and deformation mechanism of in situ al2o3p al0 25cocrfeni high entropy alloy matrix composites |
| topic | High entropy alloy matrix composites In-situ synthesis Mechanical properties Strength and ductility |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425007343 |
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