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

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 neces...

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Bibliographic Details
Published in:Journal of alloys and compounds 2020-08, Vol.832, p.155059, Article 155059
Main Authors: Kim, Hwangsun, Ahn, Jee Hyuk, Han, Seung Zeon, Jo, Janghyun, Baik, Hionsuck, Kim, Miyoung, Han, Heung Nam
Format: Article
Language:English
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Summary: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. •Microstructure of Cu–Ni–Si alloy having high strength and conductivity was observed.•Discontinuous precipitation induces strain development in Cu–Ni–Si alloy.•Nanotwins was formed by cold-drawing.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2020.155059