Low-cycle bending fatigue and electrical conductivity of high-strength Cu/Nb nanocomposite wires. (November 2019)

• Record Type: Journal Article
• Authors: Rozhnov, A.B.; Pantsyrny, V.I.; Kraynev, A.V.; Rogachev, S.O.; Nikulin, S.A.; Khlebova, N.E.; Polikarpova, M.V.; Zadorozhnyy, M.Yu.
• Is Part Of: International journal of fatigue. Volume 128(2019)
• Publication Date: 2019-11
• Subjects: Metal-matrix composites (MMCs) -- Low-cycle fatigue -- Dynamic mechanical analyzer -- Fractography -- Electrical conductivity; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2019.105188
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: The low-cycle fatigue tests of the Cu/Nb nanocomposite wires were performed with the bending scheme. The Cu/Nb nanocomposites are characterized by high fatigue strength compared to pure copper. Fatigue crack propagation in the Cu/Nb nanocomposites occurs at two large-scale levels. The accumulation of fatigue damage leads to a slight decrease in the electrical conductivity. Abstract: The comparative low-cycle fatigue tests of the Cu/Nb nanocomposite wires obtained by the "melt-and-deform" method and pure copper samples were carried out using a dynamic mechanical analyzer (DMA). The fatigue tests were carried out using transverse bending scheme. It has been established that the fatigue fracture resistance characteristics of the Cu/Nb composites significantly higher as compared to that of pure copper samples. It has been found that the fatigue crack propagation in the Cu/Nb composites occurs at two scale levels. The effect of fatigue damage accumulation on the change in the electrical resistance of the Cu/Nb composites was studied.