Cooperative twinning behavior leads to superior mechanical properties in a coherently precipitated high-entropy alloy
The mechanical properties of the coherently precipitated high-entropy alloys can be further enhanced by enhancing the strain hardening behavior through deformation twins. In this study, a heterogeneously structured Ni45Co21Fe15Cr10Al4·5Ti4.5 (at. %) alloy with micro-meter-sized grains embedded insid...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424030175 |
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| author | Shuai Yuan Xinghao Du Dezheng liu Chenxi Yuan Zeyu Xing Jinyu Zhang Hechuan Ma Shijun Zhao Wanpeng Li Baolin Wu Jun Sun |
| author_facet | Shuai Yuan Xinghao Du Dezheng liu Chenxi Yuan Zeyu Xing Jinyu Zhang Hechuan Ma Shijun Zhao Wanpeng Li Baolin Wu Jun Sun |
| author_sort | Shuai Yuan |
| collection | DOAJ |
| description | The mechanical properties of the coherently precipitated high-entropy alloys can be further enhanced by enhancing the strain hardening behavior through deformation twins. In this study, a heterogeneously structured Ni45Co21Fe15Cr10Al4·5Ti4.5 (at. %) alloy with micro-meter-sized grains embedded inside a matrix of nanocrystalline or ultrafine grains was obtained through tailored thermomechanical processing steps. The tested alloy exhibited favorable strain hardening behavior, resulting in a remarkable tensile ductility of 32% even under the high yield stress of 1400 MPa. Dense planar defects comprised of deformation twins (DTs) have been activated in the grains composed of γ phase and coherently precipitated γ′ phase during the tensile process at room temperature. The underlying mechanism for the nucleation and growth of DTs in the grains with γ/γ′ duplex phases has been elucidated through transmission electron microscopy observations and density functional theory calculation, emphasizing the importance of the DTs. This research provides new insights into designing high entropy alloys that overcome the trade-off between strength and ductility. |
| format | Article |
| id | doaj-art-0da09335722545d28af573bab140e624 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-0da09335722545d28af573bab140e6242025-01-19T06:25:50ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013419471954Cooperative twinning behavior leads to superior mechanical properties in a coherently precipitated high-entropy alloyShuai Yuan0Xinghao Du1Dezheng liu2Chenxi Yuan3Zeyu Xing4Jinyu Zhang5Hechuan Ma6Shijun Zhao7Wanpeng Li8Baolin Wu9Jun Sun10School of Materials Science & Engineering, Shenyang Aerospace University, Shenyang, 110136, People's Republic of ChinaSchool of Materials Science & Engineering, Shenyang Aerospace University, Shenyang, 110136, People's Republic of China; Corresponding author.School of Materials Science & Engineering, Shenyang Aerospace University, Shenyang, 110136, People's Republic of ChinaSchool of Materials Science & Engineering, Shenyang Aerospace University, Shenyang, 110136, People's Republic of ChinaSchool of Materials Science & Engineering, Shenyang Aerospace University, Shenyang, 110136, People's Republic of ChinaState Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of ChinaDepartment of Materials Science & Engineering, City University of Hong Kong, Kowloon, Hong KongDepartment of Materials Science & Engineering, City University of Hong Kong, Kowloon, Hong Kong; Corresponding author.Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, People's Republic of China; Corresponding author.School of Materials Science & Engineering, Shenyang Aerospace University, Shenyang, 110136, People's Republic of ChinaState Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, People's Republic of ChinaThe mechanical properties of the coherently precipitated high-entropy alloys can be further enhanced by enhancing the strain hardening behavior through deformation twins. In this study, a heterogeneously structured Ni45Co21Fe15Cr10Al4·5Ti4.5 (at. %) alloy with micro-meter-sized grains embedded inside a matrix of nanocrystalline or ultrafine grains was obtained through tailored thermomechanical processing steps. The tested alloy exhibited favorable strain hardening behavior, resulting in a remarkable tensile ductility of 32% even under the high yield stress of 1400 MPa. Dense planar defects comprised of deformation twins (DTs) have been activated in the grains composed of γ phase and coherently precipitated γ′ phase during the tensile process at room temperature. The underlying mechanism for the nucleation and growth of DTs in the grains with γ/γ′ duplex phases has been elucidated through transmission electron microscopy observations and density functional theory calculation, emphasizing the importance of the DTs. This research provides new insights into designing high entropy alloys that overcome the trade-off between strength and ductility.http://www.sciencedirect.com/science/article/pii/S2238785424030175High-entropy alloysL12-type precipitatesMechanical propertiesDeformation twinsDensity functional theory |
| spellingShingle | Shuai Yuan Xinghao Du Dezheng liu Chenxi Yuan Zeyu Xing Jinyu Zhang Hechuan Ma Shijun Zhao Wanpeng Li Baolin Wu Jun Sun Cooperative twinning behavior leads to superior mechanical properties in a coherently precipitated high-entropy alloy Journal of Materials Research and Technology High-entropy alloys L12-type precipitates Mechanical properties Deformation twins Density functional theory |
| title | Cooperative twinning behavior leads to superior mechanical properties in a coherently precipitated high-entropy alloy |
| title_full | Cooperative twinning behavior leads to superior mechanical properties in a coherently precipitated high-entropy alloy |
| title_fullStr | Cooperative twinning behavior leads to superior mechanical properties in a coherently precipitated high-entropy alloy |
| title_full_unstemmed | Cooperative twinning behavior leads to superior mechanical properties in a coherently precipitated high-entropy alloy |
| title_short | Cooperative twinning behavior leads to superior mechanical properties in a coherently precipitated high-entropy alloy |
| title_sort | cooperative twinning behavior leads to superior mechanical properties in a coherently precipitated high entropy alloy |
| topic | High-entropy alloys L12-type precipitates Mechanical properties Deformation twins Density functional theory |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424030175 |
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