Strength and electrical resistivity of heavily worked copper

Copper and its alloys are a topic of interest for various cryogenic conductor applications. Often, it is used as a supporting matrix for superconducting filaments requiring that it have good strength and high conductivity. One of the best methods to increase strength while preserving conductivity is...

Full description

Saved in:
Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2017-12, Vol.279 (1), p.12003
Main Authors: Springs, J C, Kao, Y T, Srivastava, A, Levin, Z S, Barber, R E, Hartwig, K T
Format: Article
Language:English
Subjects:
Conductors
Copper
Electrical resistivity
Equal channel angular extrusion
Filaments
Grain size
Plastic deformation
Work hardening
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Copper and its alloys are a topic of interest for various cryogenic conductor applications. Often, it is used as a supporting matrix for superconducting filaments requiring that it have good strength and high conductivity. One of the best methods to increase strength while preserving conductivity is work hardening. In this study, CDA101, CDA110, and C182 copper were processed by a severe plastic deformation (SPD) procedure called equal channel angular extrusion (ECAE). In this study we explore the relationships between the levels of plastic strain and annealing with tensile and hardness properties, grain size, and electrical resistivity. While C182 has the highest strength, it also has the lowest conductivity. CDA101 and CDA110 both retain over 95% of their conductivity in the fully worked state, while C182 has about 40% of the IACS value. Saturation of strength occurs around 3-4 ECAE passes. It is concluded that a lower amount of plastic strain via ECAE is best for creating a material with the highest combination of strength and conductivity, and is suitable for high strength high conductivity applications.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/279/1/012003