Ordered nitrogen complexes overcoming strength–ductility trade-off in an additively manufactured high-entropy alloy
Strength and ductility were simultaneously enhanced in the additively manufactured CoCrFeMnNi high-entropy alloy by laser powder bed fusion (LBPF) under reactive N2 atmosphere. It was found that nitrogen atoms picked up during additive manufacturing line-up to form ordered nitrogen complexes (ONCs)...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2020-12-01
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| Series: | Virtual and Physical Prototyping |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/17452759.2020.1840783 |
| _version_ | 1797678675894730752 |
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| author | Dandan Zhao Quan Yang Dawei Wang Ming Yan Pei Wang Mingguang Jiang Changyong Liu Dongfeng Diao Changshi Lao Zhangwei Chen Zhiyuan Liu Yuan Wu Zhaoping Lu |
| author_facet | Dandan Zhao Quan Yang Dawei Wang Ming Yan Pei Wang Mingguang Jiang Changyong Liu Dongfeng Diao Changshi Lao Zhangwei Chen Zhiyuan Liu Yuan Wu Zhaoping Lu |
| author_sort | Dandan Zhao |
| collection | DOAJ |
| description | Strength and ductility were simultaneously enhanced in the additively manufactured CoCrFeMnNi high-entropy alloy by laser powder bed fusion (LBPF) under reactive N2 atmosphere. It was found that nitrogen atoms picked up during additive manufacturing line-up to form ordered nitrogen complexes (ONCs) in the octahedral interstitial position of the HEA matrix. Dislocation multiplication is then facilitated by the formation of ONCs during LPBF, leading to a higher dislocation density with smaller dislocation cells. Dislocation strengthening, combined with interstitial strengthening, endows the additively manufactured HEA with the yielding strength of 690 MPa, 15% higher than that of the counterparts fabricated under inert atmosphere. More interestingly, the ONCs stimulate dislocation nucleation and engender more heterogeneous microstructure, giving rise to an outstanding ductility of 15.3%, with an increment of 34%. As a result, the strength–ductility trade-off was successfully reversed by the nitrogen doping during LPBF under reactive atmosphere. |
| first_indexed | 2024-03-11T23:02:20Z |
| format | Article |
| id | doaj.art-2e4a8a1d98bc47c5afff90630f4ec7e2 |
| institution | Directory Open Access Journal |
| issn | 1745-2759 1745-2767 |
| language | English |
| last_indexed | 2024-03-11T23:02:20Z |
| publishDate | 2020-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Virtual and Physical Prototyping |
| spelling | doaj.art-2e4a8a1d98bc47c5afff90630f4ec7e22023-09-21T14:38:02ZengTaylor & Francis GroupVirtual and Physical Prototyping1745-27591745-27672020-12-0115S153254210.1080/17452759.2020.18407831840783Ordered nitrogen complexes overcoming strength–ductility trade-off in an additively manufactured high-entropy alloyDandan Zhao0Quan Yang1Dawei Wang2Ming Yan3Pei Wang4Mingguang Jiang5Changyong Liu6Dongfeng Diao7Changshi Lao8Zhangwei Chen9Zhiyuan Liu10Yuan Wu11Zhaoping Lu12College of Mechatronics and Control EngineeringCollege of Mechatronics and Control EngineeringSouthern University of Science and TechnologySouthern University of Science and TechnologyCollege of Mechatronics and Control EngineeringCollege of Mechatronics and Control EngineeringCollege of Mechatronics and Control EngineeringGuangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, Shenzhen UniversityCollege of Mechatronics and Control EngineeringCollege of Mechatronics and Control EngineeringCollege of Mechatronics and Control EngineeringState Key Laboratory for Advanced Metals and Materials, University of Science and Technology BeijingState Key Laboratory for Advanced Metals and Materials, University of Science and Technology BeijingStrength and ductility were simultaneously enhanced in the additively manufactured CoCrFeMnNi high-entropy alloy by laser powder bed fusion (LBPF) under reactive N2 atmosphere. It was found that nitrogen atoms picked up during additive manufacturing line-up to form ordered nitrogen complexes (ONCs) in the octahedral interstitial position of the HEA matrix. Dislocation multiplication is then facilitated by the formation of ONCs during LPBF, leading to a higher dislocation density with smaller dislocation cells. Dislocation strengthening, combined with interstitial strengthening, endows the additively manufactured HEA with the yielding strength of 690 MPa, 15% higher than that of the counterparts fabricated under inert atmosphere. More interestingly, the ONCs stimulate dislocation nucleation and engender more heterogeneous microstructure, giving rise to an outstanding ductility of 15.3%, with an increment of 34%. As a result, the strength–ductility trade-off was successfully reversed by the nitrogen doping during LPBF under reactive atmosphere.http://dx.doi.org/10.1080/17452759.2020.1840783high-entropy alloyslaser powder bed fusionreactive atmosphereordered nitrogen complexes |
| spellingShingle | Dandan Zhao Quan Yang Dawei Wang Ming Yan Pei Wang Mingguang Jiang Changyong Liu Dongfeng Diao Changshi Lao Zhangwei Chen Zhiyuan Liu Yuan Wu Zhaoping Lu Ordered nitrogen complexes overcoming strength–ductility trade-off in an additively manufactured high-entropy alloy Virtual and Physical Prototyping high-entropy alloys laser powder bed fusion reactive atmosphere ordered nitrogen complexes |
| title | Ordered nitrogen complexes overcoming strength–ductility trade-off in an additively manufactured high-entropy alloy |
| title_full | Ordered nitrogen complexes overcoming strength–ductility trade-off in an additively manufactured high-entropy alloy |
| title_fullStr | Ordered nitrogen complexes overcoming strength–ductility trade-off in an additively manufactured high-entropy alloy |
| title_full_unstemmed | Ordered nitrogen complexes overcoming strength–ductility trade-off in an additively manufactured high-entropy alloy |
| title_short | Ordered nitrogen complexes overcoming strength–ductility trade-off in an additively manufactured high-entropy alloy |
| title_sort | ordered nitrogen complexes overcoming strength ductility trade off in an additively manufactured high entropy alloy |
| topic | high-entropy alloys laser powder bed fusion reactive atmosphere ordered nitrogen complexes |
| url | http://dx.doi.org/10.1080/17452759.2020.1840783 |
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