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The strong magnetic field systems are widely used in modern fundamental and applied research, as well as in the most advanced industrial processes. These systems generate magnetic fields ranging from 5 to 100 Tesla, which can expose conductors due to extremely high Lorentz forces. Consequently, the conductor materials must exhibit exceptional mechanical strength (with an ultimate tensile strength of at least 600 MPa) and good specific electrical conductivity (IACS ≥ 60%). Traditional conductors such as copper, aluminum, gold, and silver are unable to withstand these large stresses. Therefore, micro-composite materials of conductors have been developed, combining high strength with favorable electrical conductivity. One of the key unresolved challenges in high-field magnetic systems is the development of reliable non-destructive joints and their joining technologies. In practice, the majority of conductor joints are still made using mechanical fastening or soldering methods, which are inherently destructive and often lack long-term reliability. This study investigates resistance welding technology and properties of Cu-Nb 18% micro-composite conductor joints. The research focuses on the selection of upset welding parameters, analysis of the chemical composition and microstructure of the butt joints, evaluation of the mechanical and electrical properties of the butt joints.
Keywords: Cu-Nb 18%, micro-composite, resistance welding, ultimate strength, electrical conductivity© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.