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On the evolution of microstructure in oxygen-free high conductivity copper during thermo-mechanical processing using rotary swaging

  • Frederik Otto , Jan Frenzel and Gunther Eggeler
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 102 Issue 4

Abstract

In the present work, the processing parameters which govern the evolution of microstructure during rotary swaging and intermediate/subsequent heat treatments in copper rods were studied. Copper ingots with an initial diameter of 40 mm were reduced to a final diameter of 11.7 mm by rotary swaging. Processing sequences were applied with different intermediate anneals and various final heat treatments. The resulting microstructures were characterized using orientation imaging microscopy, optical microscopy and hardness measurements. Special emphasis was placed on the evolution of microstructure with respect to the radial and longitudinal position in the rod. Most importantly, microstructural evidence for torsional loading during swaging was found, and a spiral grain morphology was observed. Moreover, localized deformation events were identified and evidence for abnormal grain growth was found. Finally, a combination of swaging and heat treatment parameters was identified which allowed a homogeneous grain structure to be produced.

Keywords: Copper; Rotary swaging; Microstructural evolution; Recrystallization; Abnormal grain growth
* Correspondence address, Frederik Otto, Institute for Materials, Ruhr University Bochum, Universitätsstr. 150, D-44801 Bochum, Germany. Tel.: +49 234 322 8982, Fax: +49 234 321 4235, E-mail:

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Received: 2010-6-29
Accepted: 2011-2-9
Published Online: 2013-06-11
Published in Print: 2011-04-01

© 2011, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110501
Keywords for this article
Copper; Rotary swaging; Microstructural evolution; Recrystallization; Abnormal grain growth

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. On the evolution of microstructure in oxygen-free high conductivity copper during thermo-mechanical processing using rotary swaging
  5. Phase-field simulation of diffusion couples in the Ni–Al system
  6. Finnis–Sinclair potentials for fcc Au–Pd and Ag–Pt alloys
  7. Hollow pyramidal lattice truss structures
  8. Synthesis of single-phase polycrystalline Ca2Si powder and sintered compacts
  9. On the micromechanics of die compaction of composite powder materials
  10. Structural, thermal, electrical and mechanical properties of nanosilica-composite polymer electrolytes
  11. The effects of tool rotation speed and traverse speed on friction stir welding of AISI 304 austenitic stainless steel
  12. Estimation of Fe2B growth on low-carbon steel based on two diffusion models
  13. Glass-forming ability and thermal stability of gas-atomized Zr50Cu40Al10 metallic glass powders
  14. Mechanochemical synthesis of nanocrystalline lead selenide: industrial approach
  15. On abnormal grain growth in nanocrystalline materials induced by small particles
  16. High-temperature deformation behaviour of Ti3Al-11Nb intermetallic
  17. Optimization of ZnO2 nanoparticle content in binary blended concrete to enhance high strength concrete
  18. New structural and mechanical features of hexagonal materials after room temperature extrusion using the KoBo method
  19. People
  20. Yuri Estrin turns 65
  21. DGM News
  22. DGM News
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