Increasing strength and performance properties of bimetallic rods during severe plastic deformation
Volokitina I. Sapargaliyeva B. Agabekova A. Syrlybekkyzy S. Volokitin A. Nurshakhanova L. Nurbaeva F. Kolesnikov A. Sabyrbayeva G. Izbassar A. Kolesnikova O. Liseitsev Y. Vavrenyuk S.
December 2023Elsevier Ltd
Case Studies in Construction Materials
2023#19
This study describes the evolution of the microstructure and mechanical properties of bimetallic aluminum-copper rods during straining by Equal channel angular pressing-drawing (ECAP-drawing). The study was conducted by means of a transmission electron microscope, EBSD analysis, tensile tests and determination of microhardness. The paper shows that an ultrafine-grained copper-aluminum composite with a gradient structure is formed during straining by ECAP-drawing. Microhardness of copper shell during 4 cycles of straining by ECAP-drawing increased from 57 to 165, and hardness of aluminum rod increased from 25 to 75 HV. This is associated with grain refinement and hardening of their boundaries by increasing the density of dislocations. Tensile test diagrams analysis has shown that straining leads to an increase in strength properties of bimetallic wire by 2 times, and as a result the plastic properties are also reduced by almost 2 times, but remain at a level applicable for further use. Application of such bimetallic rods in construction will allow reducing specific quantity of metal per structures without reduction of strength properties.
Aluminum-copper rods , Bimetallic rods , Mechanical properties , Microstructure , Severe plastic deformation
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Department of Metal forming, Karaganda State Industrial University, Republic av. 30, Temirtau, 101400, Kazakhstan
Abai Kazakh National Pedagogical University, Almaty, 050010, Kazakhstan
Department of Electrical engineering, Khoja Akhmet Yassawi International Kazakh-Turkish University, Turkestan, 16120, Kazakhstan
Department of Ecology and Geology, Sh. Yesenov Caspian University of Technology and Engineering, 32 md, Aktau, 130002, Kazakhstan
Department of Construction Engineering, Sh. Yesenov Caspian University of Technology and Engineering, 32 md, Aktau, 130002, Kazakhstan
Department of Life Safety and Environmental Protection, M. Auezov South Kazakhstan University, Tauke Khan Av., 5, Shymkent, 160012, Kazakhstan
Department of Science, Production and Innovation, M. Auezov South Kazakhstan University, Tauke Khan Av., 5, Shymkent, 160012, Kazakhstan
Far Eastern Federal University, Vladivostok, 690922, Russian Federation
Branch of Federal State Unitary Enterprise TsNIIP of the Ministry of Construction of Russia DalNIIS, Vladivostok, 690033, Russian Federation
Department of Metal forming
Abai Kazakh National Pedagogical University
Department of Electrical engineering
Department of Ecology and Geology
Department of Construction Engineering
Department of Life Safety and Environmental Protection
Department of Science
Far Eastern Federal University
Branch of Federal State Unitary Enterprise TsNIIP of the Ministry of Construction of Russia DalNIIS
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