Microstructural characterization of cold-drawn Cu–Ni–Si alloy having high strength and high conductivity

H Kim, JH Ahn, SZ Han, J Jo, H Baik, M Kim… - Journal of Alloys and …, 2020 - Elsevier
H Kim, JH Ahn, SZ Han, J Jo, H Baik, M Kim, HN Han
Journal of Alloys and Compounds, 2020Elsevier
A Cu alloy with high strength and conductivity, which are trade off characteristics, was
developed using discontinuous precipitates as the hardening agent. The scanning electron
microscopy and transmission electron microscopy results showed that a considerable
internal strain and geometrically necessary dislocations were generated in the alloy
because of discontinuous precipitation. Furthermore, nanotwins, which are rarely observed
in cold-drawn Cu–Ni–Si alloys, were observed in the alloy. Since nanotwins show little effect …
Abstract
A Cu alloy with high strength and conductivity, which are trade off characteristics, was developed using discontinuous precipitates as the hardening agent. The scanning electron microscopy and transmission electron microscopy results showed that a considerable internal strain and geometrically necessary dislocations were generated in the alloy because of discontinuous precipitation. Furthermore, nanotwins, which are rarely observed in cold-drawn Cu–Ni–Si alloys, were observed in the alloy. Since nanotwins show little effect on the electrical resistivity of Cu alloys while effectively interfering with the dislocation movement, they are one of the key factors endowing Cu alloys with the trade-off characteristics of high strength and conductivity.
Elsevier
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