| Issue |
MATEC Web Conf.
Volume 417, 2025
2025 RAPDASA-RobMech-PRASA-AMI Conference: Bridging the Gap between Industry & Academia - The 26th Annual International RAPDASA Conference, joined by RobMech, PRASA and AMI, co-hosted by CSIR and Tshwane University of Technology, Pretoria
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| Article Number | 05006 | |
| Number of page(s) | 7 | |
| Section | Process Development | |
| DOI | https://doi.org/10.1051/matecconf/202541705006 | |
| Published online | 25 November 2025 | |
Effects of extended soaking time preceding roll bonding on the microstructure and mechanical properties of a modified AA3003 cladded with AA4045
1 Advanced Materials Division, MINTEK, Randburg, South Africa.
2 Department of Material Science and Metallurgical Engineering, University of Pretoria, South Africa.
3 Engineering Services, Armscor, Dockyard, Simon’s Town, Cape Town, South Africa.
4 Hulamin Operations Proprietary Limited, Moses Mabhida Road, South Africa.
* Corresponding author: josephm@mintek.co.za
The effect of the extended soaking period in hours on the microstructure and mechanical properties of a modified AA3003mod cladded with AA4045 for use in automobile heat exchangers investigated. The alloys were roll bonded to have a final thickness of 300 μm. Intermediate annealing (IA) was conducted during cold rolling at temperatures of between 270 and 350 °C. The microstructures were investigated by using electron backscattered diffraction (EBSD). The fractographs of tensile-test specimens were analysed using the SEM-SEI. The UTS and YS of the samples soaked for longer residence times of 45 h, were found to be on the lower end of the 9031-H24 specification. Extended soaking time increased Al-Mn-Fe intermetallic phases observed on fracture surfaces, which degraded the yield strength (Rp0.2) by 35 MPa.
© The Authors, published by EDP Sciences, 2025
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