The effect of rolling direction on the creep process of Al–Cu bimetallic sheet |
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| Affiliation: | 1. Institute of Materials and Joining Technology, Otto-von-Guericke University Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany;2. High Temperature Materials and Powder Metallurgy Department, National Technical University of Ukraine “KPI”, Peremogy Av. 37, 03056 Kiev, Ukraine;3. Actually at Institute of Energy and Climate Research (IEK-2), Forschungszentrum Jülich, 52425 Jülich, Germany;1. Centre of Mathematical Modeling, Pidstryhach Institute of Applied Problems of Mechanics and Mathematics of Ukrainian National Academy of Sciences, Dudaeva Street 15, 70005 Lviv, Ukraine;2. Faculty of Mechanical Engineering, University of Zielona Góra, Ul. Prof. Szafrana 4, 65-516 Zielona Góra, Poland;3. Department of Mathematical Modeling, Ivan Franko National University of Lviv, Universytetska Street 1, 79000 Lviv, Ukraine;1. Shanxi Provincial Key Laboratory for Controlled Metal Solidification and Precision Manufacturing, College of Materials Science and Engineering, North University of China, Taiyuan 030051, China;2. Key Laboratory of Superlight Material & Surface Technology of Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China |
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| Abstract: | The study of the mechanical properties of aluminium–copper (Al–Cu) metal layered composite, formed by joining aluminium and copper sheets in the process of rolling have been presented in this paper. The influence of the rolling direction on the basic strength parameters and rheological properties of the composite was analysed. All tests were carried out on flat specimens cut from a sheet in the direction compatible with the rolling direction (RD) and transverse direction (TD). Preliminary tests of monotonic uniaxial tension at a temperature of 293 K were carried out and the basic mechanical properties of Al–Cu bimetal were determined. The hardening process of the material was described by the three-parameter Swift’s equation. The essential creep tests were carried out at a temperature of 523 K in the range of stress 88.5–137.9 MPa. The relation between minimum creep rate and applied stress for the specimens cut from the RD and TD directions were determined. The relationships between the time to fracture, stress, and rupture elongation, obtained from the creep tests, were determined as well. Variations of the steady creep rate with time to fracture by using the Monkman–Grant’s model and its modifications were analysed. It was found that the rolling process strongly affected the short-time monotonic deformation at 293 K and the creep process at 523 K temperature. |
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