Chemical inhomogeneity–induced profuse nanotwinning and phase transformation in AuCu nanowires
Abstract Nanosized metals usually exhibit ultrahigh strength but suffer from low homogeneous plasticity. The origin of a strength–ductility trade-off has been well studied for pure metals, but not for random solid solution (RSS) alloys. How RSS alloys accommodate plasticity and whether they can achi...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-09-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-023-41485-2 |
| _version_ | 1827709547818516480 |
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| author | Chengpeng Yang Bozhao Zhang Libo Fu Zhanxin Wang Jiao Teng Ruiwen Shao Ziqi Wu Xiaoxue Chang Jun Ding Lihua Wang Xiaodong Han |
| author_facet | Chengpeng Yang Bozhao Zhang Libo Fu Zhanxin Wang Jiao Teng Ruiwen Shao Ziqi Wu Xiaoxue Chang Jun Ding Lihua Wang Xiaodong Han |
| author_sort | Chengpeng Yang |
| collection | DOAJ |
| description | Abstract Nanosized metals usually exhibit ultrahigh strength but suffer from low homogeneous plasticity. The origin of a strength–ductility trade-off has been well studied for pure metals, but not for random solid solution (RSS) alloys. How RSS alloys accommodate plasticity and whether they can achieve synergy between high strength and superplasticity has remained unresolved. Here, we show that face-centered cubic (FCC) RSS AuCu alloy nanowires (NWs) exhibit superplasticity of ~260% and ultrahigh strength of ~6 GPa, overcoming the trade-off between strength and ductility. These excellent properties originate from profuse hexagonal close-packed (HCP) phase generation (2H and 4H phases), recurrence of reversible FCC-HCP phase transition, and zigzag-like nanotwin generation, which has rarely been reported before. Such a mechanism stems from the inherent chemical inhomogeneity, which leads to widely distributed and overlapping energy barriers for the concurrent activation of multiple plasticity mechanisms. This naturally implies a similar deformation behavior for other highly concentrated solid-solution alloys with multiple principal elements, such as high/medium-entropy alloys. Our findings shed light on the effect of chemical inhomogeneity on the plastic deformation mechanism of solid-solution alloys. |
| first_indexed | 2024-03-10T17:22:34Z |
| format | Article |
| id | doaj.art-880a48671f7c4215857425838fec708f |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-10T17:22:34Z |
| publishDate | 2023-09-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-880a48671f7c4215857425838fec708f2023-11-20T10:16:56ZengNature PortfolioNature Communications2041-17232023-09-0114111210.1038/s41467-023-41485-2Chemical inhomogeneity–induced profuse nanotwinning and phase transformation in AuCu nanowiresChengpeng Yang0Bozhao Zhang1Libo Fu2Zhanxin Wang3Jiao Teng4Ruiwen Shao5Ziqi Wu6Xiaoxue Chang7Jun Ding8Lihua Wang9Xiaodong Han10Faculty of Materials and Manufacturing, Institute of Microstructure and Property of Advanced Materials, Beijing University of TechnologyCenter for Alloy Innovation and Design, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong UniversityFaculty of Materials and Manufacturing, Institute of Microstructure and Property of Advanced Materials, Beijing University of TechnologyFaculty of Materials and Manufacturing, Institute of Microstructure and Property of Advanced Materials, Beijing University of TechnologyDepartment of Material Physics and Chemistry, University of Science and Technology BeijingBeijing Advanced Innovation Center for Intelligent Robots and Systems, School of Medical Technology, Beijing Institute of TechnologyBeijing Advanced Innovation Center for Intelligent Robots and Systems, School of Medical Technology, Beijing Institute of TechnologyBeijing Advanced Innovation Center for Intelligent Robots and Systems, School of Medical Technology, Beijing Institute of TechnologyCenter for Alloy Innovation and Design, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong UniversityFaculty of Materials and Manufacturing, Institute of Microstructure and Property of Advanced Materials, Beijing University of TechnologyFaculty of Materials and Manufacturing, Institute of Microstructure and Property of Advanced Materials, Beijing University of TechnologyAbstract Nanosized metals usually exhibit ultrahigh strength but suffer from low homogeneous plasticity. The origin of a strength–ductility trade-off has been well studied for pure metals, but not for random solid solution (RSS) alloys. How RSS alloys accommodate plasticity and whether they can achieve synergy between high strength and superplasticity has remained unresolved. Here, we show that face-centered cubic (FCC) RSS AuCu alloy nanowires (NWs) exhibit superplasticity of ~260% and ultrahigh strength of ~6 GPa, overcoming the trade-off between strength and ductility. These excellent properties originate from profuse hexagonal close-packed (HCP) phase generation (2H and 4H phases), recurrence of reversible FCC-HCP phase transition, and zigzag-like nanotwin generation, which has rarely been reported before. Such a mechanism stems from the inherent chemical inhomogeneity, which leads to widely distributed and overlapping energy barriers for the concurrent activation of multiple plasticity mechanisms. This naturally implies a similar deformation behavior for other highly concentrated solid-solution alloys with multiple principal elements, such as high/medium-entropy alloys. Our findings shed light on the effect of chemical inhomogeneity on the plastic deformation mechanism of solid-solution alloys.https://doi.org/10.1038/s41467-023-41485-2 |
| spellingShingle | Chengpeng Yang Bozhao Zhang Libo Fu Zhanxin Wang Jiao Teng Ruiwen Shao Ziqi Wu Xiaoxue Chang Jun Ding Lihua Wang Xiaodong Han Chemical inhomogeneity–induced profuse nanotwinning and phase transformation in AuCu nanowires Nature Communications |
| title | Chemical inhomogeneity–induced profuse nanotwinning and phase transformation in AuCu nanowires |
| title_full | Chemical inhomogeneity–induced profuse nanotwinning and phase transformation in AuCu nanowires |
| title_fullStr | Chemical inhomogeneity–induced profuse nanotwinning and phase transformation in AuCu nanowires |
| title_full_unstemmed | Chemical inhomogeneity–induced profuse nanotwinning and phase transformation in AuCu nanowires |
| title_short | Chemical inhomogeneity–induced profuse nanotwinning and phase transformation in AuCu nanowires |
| title_sort | chemical inhomogeneity induced profuse nanotwinning and phase transformation in aucu nanowires |
| url | https://doi.org/10.1038/s41467-023-41485-2 |
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