Strength and electrical conductivity of a deformation-processed Cu-5 Pct Nb composite |
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Authors: | W A Spitzig H L Downing F C Laabs E D Gibson J D Verhoeven |
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Affiliation: | (1) Ames Laboratory, Iowa State University, 50011 Ames, IA;(2) Drake University, 50311 Des Moines, IA |
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Abstract: | A Cu-5 pct Nb alloy was deformation processed by wire drawing to very large reductions (99.9993 pct) and the strength and
electrical conductivity properties compared with similarly deformation processed Cu-20 pct Nb. The results showed that the
Cu-5 pct Nb alloy was transformed into a composite material with the original Nb dendrites becoming ribbonlike filaments in
a similar fashion to higher Nb-containing Cu-Nb alloys. The degree of strength increase with increasing deformation processing
greatly exceeds rule-of-mixtures expectations at higher degrees of deformation processing, where the Nb becomes highly aligned
with the wire axis. A 5 pct Nb addition appears to contain close to the minimum amount of Nb phase necessary to produce appreciable
strengthening during deformation processing of Cu-Nb alloys. The strength-conductivity properties of the deformation-processed
Cu-5 pct Nb alloy show significant improvements in strength over the best commercial alloys in the conductivity range of 80
to 90 pct international annealed copper standard (IACS).
This article is based on a presentation made in the symposium “High Performance Copper-Base Materials” as part of the 1991
TMS Annual Meeting, February 17–21, 1991, New Orleans, LA, under the auspices of the TMS Structural Materials Committee. |
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