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

Hwangsun Kim; Jee Hyuk Ahn; Seung Zeon Han; Janghyun Jo; Hionsuck Baik; Miyoung Kim; Heung Nam Han

doi:10.1016/j.jallcom.2020.155059

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

Hwangsun Kim, Jee Hyuk Ahn, Seung Zeon Han, Janghyun Jo, Hionsuck Baik, Miyoung Kim, Heung Nam Han

Research output: Contribution to journal › Article › peer-review

55 Scopus citations

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.

Original language	English
Article number	155059
Journal	Journal of Alloys and Compounds
Volume	832
DOIs	https://doi.org/10.1016/j.jallcom.2020.155059
State	Published - Aug 15 2020
Externally published	Yes

Funding

This work was supported by the National Research Foundation of Korea (NRF) grants funded by the Ministry of Science and ICT (MSIT) [No. 2020R1A5A6017701 and No. 2018R1A2B6006856 ]. The Institute of Engineering Research at Seoul National University provided research facilities for this work. This work was supported by the National Research Foundation of Korea (NRF) grants funded by the Ministry of Science and ICT (MSIT) [No. 2020R1A5A6017701 and No. 2018R1A2B6006856]. The Institute of Engineering Research at Seoul National University provided research facilities for this work.

Keywords

Cu alloy
Intermetallics
Microstructure
Nanostructured materials
Transmission electron microscopy

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10.1016/j.jallcom.2020.155059

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

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.",

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author = "Hwangsun Kim and Ahn, {Jee Hyuk} and Han, {Seung Zeon} and Janghyun Jo and Hionsuck Baik and Miyoung Kim and Han, {Heung Nam}",

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AU - Kim, Hwangsun

AU - Ahn, Jee Hyuk

AU - Han, Seung Zeon

AU - Jo, Janghyun

AU - Baik, Hionsuck

AU - Kim, Miyoung

AU - Han, Heung Nam

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N2 - 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.

AB - 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.

KW - Cu alloy

KW - Intermetallics

KW - Microstructure

KW - Nanostructured materials

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

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Keywords

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