Microstructure and electrical conductivity of aluminium/steel bimetallic rods processed by severe plastic deformation

Yuanshen Qi*, Rimma Lapovok, Yuri Estrin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Equal-channel angular pressing (ECAP) was used to fabricate Al/steel bimetallic rod for potential application in overhead transmission conductors. Bimetallic rods consisted of an austenitic stainless steel 316L core and an Al alloy 6201 cladding layer. By means of ECAP processing at 175°C, increase of mechanical strength without loss of electrical conductivity was achieved for one particular rod geometry out of three geometries tested. X-ray diffraction and transmission electron microscopy were employed to analyse how the microstructure was influenced by the number of processing passes and the bimetallic rod geometry. The co-deformation mechanism of the bimetallic rod under ECAP and accelerated dynamic ageing of Al alloy 6201 were discussed based on the microstructure characterisation results.

Original languageEnglish
Pages (from-to)6860-6875
Number of pages16
JournalJournal of Materials Science
Volume51
Issue number14
DOIs
StatePublished - 1 Jul 2016
Externally publishedYes

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