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Journal of Materials Science

, Volume 51, Issue 14, pp 6860–6875 | Cite as

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

  • Yuanshen Qi
  • Rimma Lapovok
  • Yuri Estrin
Original Paper

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.

Keywords

Severe Plastic Deformation Friction Stir Processing Accumulative Roll Bonding Extrusion Direction Steel Core 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The authors appreciate the excellent technical assistance provided by Monash Centre of Electron Microscopy (MCEM). YQ is grateful to Dr. Enrico Bruder for technical discussions and Dr. Annalena Wolff for FIB training. YE acknowledges funding support from the Russian Ministry for Education and Science (Grant #14.A12.31.0001). RL acknowledges funding support from Australian Research Council (Grant # LP0991316).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflicts of interest.

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringMonash UniversityClaytonAustralia
  2. 2.Institute for Frontier MaterialsDeakin UniversityGeelongAustralia
  3. 3.Laboratory of Hybrid Nanostructured MaterialsNUST MISiSMoscowRussia

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