Study of changes in microstructure and metal interface Cu/Al during bimetallic construction wire straining
Volokitina I. Sapargaliyeva B. Agabekova A. Volokitin A. Syrlybekkyzy S. Kolesnikov A. Ulyeva G. Yerzhanov A. Kozlov P.
July 2023Elsevier Ltd
Case Studies in Construction Materials
2023#18
This article investigates the effect of a new processing technology on the change in microstructure and mechanical properties of bimetallic aluminum-copper wire. This technology makes it possible to produce a new generation of wire for use in the construction of new overhead lines and reconstruction of old ones. The study was conducted using a transmission electron microscope, EBSD analysis, tensile tests, and determination of microhardness and electrical conductivity. The results of the study show that an ultrafine-grained copper-aluminum composite with a gradient structure is formed during straining by ECAP-drawing. Annealing after straining at 200 °C increases the strength of the interfacial connection between Cu and Al and improves the strength characteristics of the bimetallic aluminum-copper wire. The use of such aluminum-copper wires for overhead transmission lines allows to reduce the wire cross-section and, accordingly, wind loads, as well as to increase the strength properties without an additional increase in the total weight of the wire.
Aluminum-copper wire , Bimetallic construction wire , Mechanical properties , Microstructure , Severe plastic deformation
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Department of Metallurgy and Mining, Rudny Industrial Institute, 50 let Oktyabrya str. 38, Rudny, 111500, Kazakhstan
Abai Kazakh National Pedagogical University, Almaty, 050010, Kazakhstan
Department of Electrical engineering, H. A. Yassavi International Kazakh-Turkish University, Turkestan, 16120, Kazakhstan
Department of Metal forming, Karaganda State Industrial University, Republic av. 30, Temirtau, 101400, Kazakhstan
Department of Ecology and Geology, Sh. Yesenov Caspian University of Technology and Engineering Kazakhstan, 32 md, Aktau, 130002, Kazakhstan
Department of Life Safety and Environmental Protection, M. Auezov South Kazakhstan University, Tauke Khan Av., 5, Shymkent, 160012, Kazakhstan
ArcelorMittal Temirtau” Corporation, Temirtau, 101400, Kazakhstan
Polytechnic Institute, Far Eastern Federal University, Vladivostok, 690922, Russian Federation
Department of Metallurgy and Mining
Abai Kazakh National Pedagogical University
Department of Electrical engineering
Department of Metal forming
Department of Ecology and Geology
Department of Life Safety and Environmental Protection
ArcelorMittal Temirtau” Corporation
Polytechnic Institute
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