Achieving high strength and high conductivity synergy through hierarchical precipitation stimulated structural heterogeneities in a Cu-Ag-Zr alloy
Cu alloys can be plastically deformed to reach ultra-high strength, but often at an expense of their electrical conductivity. Here we report that the introduction of hierarchical precipitations and the resultant microstructural heterogeneities at different scales could overcome the strength-conducti...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-07-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522003999 |
| _version_ | 1811235576746082304 |
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| author | Xiang Wu Jiaxuan Zhang Richu Wang Zainab Zafar Xiaochun Liu Yujing Liu Lihua Qian Lixin Sun |
| author_facet | Xiang Wu Jiaxuan Zhang Richu Wang Zainab Zafar Xiaochun Liu Yujing Liu Lihua Qian Lixin Sun |
| author_sort | Xiang Wu |
| collection | DOAJ |
| description | Cu alloys can be plastically deformed to reach ultra-high strength, but often at an expense of their electrical conductivity. Here we report that the introduction of hierarchical precipitations and the resultant microstructural heterogeneities at different scales could overcome the strength-conductivity tradeoff in Cu-Ag-Zr alloy. The intrinsic particle size dependent precipitation behavior, owing to the different cooling rate during powder atomization, has been inherited after hot isostatic pressing (HIP) of powders into bulk sample. The following cold rolling and aging created multi-scale structures with the sub-micron particles at grain boundaries and sub-micron-to-nano scale precipitates in the grain interior. Those introduced heterogeneous precipitate configurations also altered the evolution of deformation structures during cold rolling and aging, with partially recrystallized grains embedded in highly deformed matrix featured by high density of dislocation and substructures, which results in an excellent combination of tensile strength (704 MPa), electrical conductivity (88.7% IACS), and tensile elongation (14.9%). Besides, no significant coarsening in the micro-nano structures is observed after annealing at 450 °C for 1 h. The findings in this work proposed a novel approach for designing high-strength, high-conductivity, and high-thermal stability copper alloys based on hierarchical precipitation-stimulated structures at nano-to-micron scale. |
| first_indexed | 2024-04-12T11:54:23Z |
| format | Article |
| id | doaj.art-011122b385a34834a8ff76a481db7b60 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-12T11:54:23Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-011122b385a34834a8ff76a481db7b602022-12-22T03:34:02ZengElsevierMaterials & Design0264-12752022-07-01219110777Achieving high strength and high conductivity synergy through hierarchical precipitation stimulated structural heterogeneities in a Cu-Ag-Zr alloyXiang Wu0Jiaxuan Zhang1Richu Wang2Zainab Zafar3Xiaochun Liu4Yujing Liu5Lihua Qian6Lixin Sun7Institute of Metals, College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, ChinaInstitute of Metals, College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaInstitute of Metals, College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, ChinaInstitute of Metals, College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China; Corresponding author.Institute of Metals, College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, ChinaSchool of Physics, Huazhong University of Science and Technology, Wuhan 430074, ChinaKey Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, ChinaCu alloys can be plastically deformed to reach ultra-high strength, but often at an expense of their electrical conductivity. Here we report that the introduction of hierarchical precipitations and the resultant microstructural heterogeneities at different scales could overcome the strength-conductivity tradeoff in Cu-Ag-Zr alloy. The intrinsic particle size dependent precipitation behavior, owing to the different cooling rate during powder atomization, has been inherited after hot isostatic pressing (HIP) of powders into bulk sample. The following cold rolling and aging created multi-scale structures with the sub-micron particles at grain boundaries and sub-micron-to-nano scale precipitates in the grain interior. Those introduced heterogeneous precipitate configurations also altered the evolution of deformation structures during cold rolling and aging, with partially recrystallized grains embedded in highly deformed matrix featured by high density of dislocation and substructures, which results in an excellent combination of tensile strength (704 MPa), electrical conductivity (88.7% IACS), and tensile elongation (14.9%). Besides, no significant coarsening in the micro-nano structures is observed after annealing at 450 °C for 1 h. The findings in this work proposed a novel approach for designing high-strength, high-conductivity, and high-thermal stability copper alloys based on hierarchical precipitation-stimulated structures at nano-to-micron scale.http://www.sciencedirect.com/science/article/pii/S0264127522003999Copper alloyHot isostatic pressingHierarchical precipitation-stimulated structuresElectrical conductivityMechanical propertyThermal stability |
| spellingShingle | Xiang Wu Jiaxuan Zhang Richu Wang Zainab Zafar Xiaochun Liu Yujing Liu Lihua Qian Lixin Sun Achieving high strength and high conductivity synergy through hierarchical precipitation stimulated structural heterogeneities in a Cu-Ag-Zr alloy Materials & Design Copper alloy Hot isostatic pressing Hierarchical precipitation-stimulated structures Electrical conductivity Mechanical property Thermal stability |
| title | Achieving high strength and high conductivity synergy through hierarchical precipitation stimulated structural heterogeneities in a Cu-Ag-Zr alloy |
| title_full | Achieving high strength and high conductivity synergy through hierarchical precipitation stimulated structural heterogeneities in a Cu-Ag-Zr alloy |
| title_fullStr | Achieving high strength and high conductivity synergy through hierarchical precipitation stimulated structural heterogeneities in a Cu-Ag-Zr alloy |
| title_full_unstemmed | Achieving high strength and high conductivity synergy through hierarchical precipitation stimulated structural heterogeneities in a Cu-Ag-Zr alloy |
| title_short | Achieving high strength and high conductivity synergy through hierarchical precipitation stimulated structural heterogeneities in a Cu-Ag-Zr alloy |
| title_sort | achieving high strength and high conductivity synergy through hierarchical precipitation stimulated structural heterogeneities in a cu ag zr alloy |
| topic | Copper alloy Hot isostatic pressing Hierarchical precipitation-stimulated structures Electrical conductivity Mechanical property Thermal stability |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522003999 |
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