What is it about?
The main objective of this work is to obtain a multilayer Al-Cu composite by hot rolling and determine the characteristics of this layered composite. The purpose of this work was to create multilayer type samples of copper and aluminum. To make these samples, were used commercial extrusion aluminum from the 6000 series (EN-AW-6060 T6) and Cu-ETP (electrolytic tough pitch copper) ½ hard (CW004A). The multilayering of the composite was made after hot rolling.
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Why is it important?
Through the approaches in this article, an attempt was made to analyze the bonding of Al-Cu bimetallic composite layers and the highlight of the diffusion at the boundary between the layers, by hot rolling. An aluminum alloy 6060 plate (EN-AW AlMgSi) and a Cu-ETP1/2hard(CW004A) plate were used. All of these layers of materials were TIG-welded, at both ends, into a heat-treated layered composite and subsequently subjected to the hot-rolling process. The Al-Cucomposite material obtained was analyzed by scanning electronic microscopy (SEM) analysis, after being subjected to the tensile test, as well as energy-dispersive X-ray (EDX) analysis. The obtained results highlighted the diffusion at the boundary between the layers of the Al-Cu composite as well as its ductile breakage and the distribution of the amount of Al and Cu at the interface of the layers.
Perspectives
The Al-Cu rolling sheets show poor interfacial bonding. A heterogeneous structure can be observed with discrete cracks and defects at the interface of the Al-Cu layers. With an increased number of cycles of the annealing–hot rolling of the multilayer Al-Cu composite, this becomes a more homogeneous structure.2.The rolling reduction has a significant effect on the deformation of Al-Cu hot-rolled sheets. The deformation of each layer was analyzed. Severe deformation by hot rolling leads to better bonding. As the number of severe hot rolling increases, diffusion occurs, and a better bond between them is obtained.3. The stress–strain curve indicates that the fracture appears first in the Al layer.4.The elongation to failure was increased after the first two cycles of annealing and hot rolling up to 23% (first break of aluminum) and was increased at 34% (second break).
PhD Ioana Monica Sas-Boca
Universitatea Tehnica din Cluj-Napoca
Read the Original
This page is a summary of: Studies on Hot-Rolling Bonding of the Al-Cu Bimetallic Composite, Materials, December 2022, MDPI AG,
DOI: 10.3390/ma15248807.
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