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Effect of annealing temperature and time on the microstructure, mechanical properties and conductivity of cold-rolled explosive Cu/Al composite sheets
Open accessAbstract
Abstract The 1.5 mm thick Cu/Al composite sheet was obtained after explosive-welding and 6 passes cold rolling. The effects of annealing temperature and time on the microstructure, mechanical properties, and conductivity of cold-rolled Cu/Al composite sheets were investigated. The results show that the thickness of the interface diffusion layer with compounds of Al 2 Cu, AlCu, and Al 4 Cu 9 increases with the increase in annealing temperature and holding time, and the total activation energy is 108 kJ mol −1 . The tensile strength of composite sheets decreases and the fracture elongation increases with the increase of annealing temperature. Especially when the annealing temperature increased from 300 ℃ to 350 ℃, the tensile yield strength decreased from 225 MPa to 77 MPa, and the elongation increased from 16% to 37.5%. The tensile-shear strength of composite sheets reaches to 117 MPa after annealing at 400 ℃ for 2 h. The conductivity of composite sheet is greatly affected by the annealing time. At the annealing temperature of 350 ℃ and time of 4 h, the composite sheets show a better conductivity of 96.4% IACS.
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“Depending on the thermal impact, these differ in their formation type and thickness.”
From Investigation of the Microstructure and Properties of Aluminum–Copper Compounds Fabricated by the High-Pressure Die Casting Process (2022) · cites this paper as [1]
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“Li et al. [1] showed this relationship in their investigations by means of annealing experiments.Thereby, a formation and growth of the intermetallic phases dependent on the annealing time, as well as temperature, could be detected.”
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“The most common practice employs four-point resistance measurements [11][12][13][14][28][29][30][31][32][33][34][35], while in some cases (typically thin sheets) an eddy current resistivity measurement technique is used [18,36].”
From Electrical and thermal stability of Al-Cu welds: Performance benchmarking of the hybrid metal extrusion and bonding process (2022) · cites this paper as [18]
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Elkjaer, A., Sørhaug, J. A., Ringen, G., Bjørge, R., & Grong, Ø. (2022) · Journal of Manufacturing Processes · doi:10.1016/j.jmapro.2022.04.029 · Cited by 23
Nolte, N., Lukasczyk, T., & Mayer, B. (2022) · Metals · doi:10.3390/met12081314 · Cited by 5
“[1] showed this relationship in their investigations by means of annealing experiments.”
Method
Metadata
- Authors
- Li, H., Yang, Y., Liang, X., Zhang, W., Cao, L., Wu, C., Zeng, Z., & Wang, L.
- Affiliations
- Central South University (CN)
- Corresponding author
- Li, Huizhong
- Liang, Xiaopeng
- Wang, Li
- Venue
- Materials Research Express
- Publisher
- IOP Publishing
- Published
- 2020-10-01
- Volume
- 7
- Issue
- 10
- Pages
- 106502
- ISSN
- 2053-1591 (ISSN-L)
- OpenAlex
- W3088381361
- Cited by
- 26
- References
- 0
- Citations by year
- 2026: 4 · 2025: 7 · 2024: 6 · 2023: 3 · 2022: 4 · 2021: 2
- FWCI
- 1.11
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Materials Research Express (publishedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Funders
- Fundamental Research Fund for the Central Universities of Central South University (502041002)
- National key research and development plan of China (2016YFB0700302)
- National Natural Science Foundation of China (51771232)
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Welding Techniques Analysis
- Physical Sciences › Materials Science › Metals and Alloys › Microstructure and mechanical properties
- Physical Sciences › Materials Science › Metals and Alloys › Metallurgy and Material Science
- Keywords
- explosive welding, cold rolling, annealing temperature, annealing time, AlCu, Al4Cu9, activation energy, tensile strength, yield strength, fracture elongation, lap shear strength, electrical conductivity, microstructure
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- Li, H., Yang, Y., Liang, X., Zhang, W., Cao, L., Wu, C., Zeng, Z., & Wang, L. (2020). Effect of annealing temperature and time on the microstructure, mechanical properties and conductivity of cold-rolled explosive Cu/Al composite sheets. Materials Research Express. https://doi.org/10.1088/2053-1591/abbba9
