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Microstructure and mechanical properties of Cu–Ag microcomposites for conductor wires in pulsed high-field magnets

  • Wolfgang Grünberger EMAIL logo , Martin Heilmaier and Ludwig Schultz
Published/Copyright: December 27, 2021
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 93 Issue 1

Abstract

The influence of heat treatment and cold deformation on microstructure and mechanical properties of Cu–Ag alloys with more than 20 wt.% Ag has been investigated. Due to the embedding of the Cu-rich dendrites by the Ag–Cu eutectic high-angle grain boundaries are absent in the as-cast state of these compositions. Hence, the continuous precipitation of Ag particles is favored in comparison with discontinuous precipitation reactions observed in Cu alloys containing less than 8 wt.% Ag. The tensile strength after heavy cold deformation is enhanced by a beneficial superposition of several effects: (i) The solid solution hardening of the Cu-rich dendrites, (ii) the age hardening of silver precipitates inside the dendrites and the high work hardening rate of the peak-aged state, (iii) the phase boundary hardening of the Ag-rich eutectic, and (iv) the increase of cooling velocity after solidification of continuously cast billets which determines the extent of the Ag supersaturation in the copper matrix. As a consequence, with a continuously cast starting billet of 12 mm diameter an optimum value for the ultimate tensile strength of 1.3 GPa is obtained after a total drawing strain of only η = 4.3.

Keywords: Cu–Ag alloys; Cold working; Aging; Microstructure; Mechanical properties
Dr. W. Grünberger IFW Dresden, Institute for Metallic Materials P.O. Box 27 00 16, D-01171 Dresden, Germany Tel.: +49 351 4659 667 Fax: +49 351 4659 781

  1. This work was funded by Sächsisches Ministerium für Wissenschaft und Kunst (SMWK). Thanks are also due to R. Opitz, A. Güth, H. Saage, and H. J. Klauß for experimental support.

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Received: 2001-04-21
Published Online: 2021-12-27

© 2002 Carl Hanser Verlag, München

Articles in the same Issue

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  2. Editorial
  3. Editorial
  4. Aufsätze/Articles
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  6. Anisotropic high cycle fatigue behaviour of duplex stainless steels: influence of microstresses
  7. Liquid and solid inclusions at advancing steel solidification fronts
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  9. The dependence of hot deformation-recrystallisation properties of Al-6063 (Etial-60) alloy on homogenisation practice
  10. Relaxation of residual stress in AISI 347 welded pipe: a time-of-flight neutron diffraction study
  11. Excellent plasticity revealed in high purity Si steels by the addition of Cr
  12. Phase formation and reaction kinetics in the vanadium– tin system
  13. Microstructure and mechanical properties of Cu–Ag microcomposites for conductor wires in pulsed high-field magnets
  14. Solid–liquid reaction synthesis and simultaneous densification of polycrystalline Ti2AlC
  15. Dislocation glide on non-compact crystal planes in copper
  16. Residual stresses in Cu–Fe –TiC sintered materials after grinding and after shot peening
  17. Mitteilungen/Notifications
  18. Instructions to authors
  19. Richtlinien für autoren
  20. Personen
  21. Bücher/Books
  22. Tagungen/Conferences
  23. Corrigendum
  24. Corrigendum
https://doi.org/10.3139/ijmr-2002-0010
Keywords for this article
Cu–Ag alloys; Cold working; Aging; Microstructure; Mechanical properties

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Editorial
  4. Aufsätze/Articles
  5. Microstructure and texture of ausformed NiTi
  6. Anisotropic high cycle fatigue behaviour of duplex stainless steels: influence of microstresses
  7. Liquid and solid inclusions at advancing steel solidification fronts
  8. Structural differences between the nanocrystalline soft magnetic Fe73.5Si13.5B9Nb3Cu1 and Fe86Zr7B6Cu1 alloys
  9. The dependence of hot deformation-recrystallisation properties of Al-6063 (Etial-60) alloy on homogenisation practice
  10. Relaxation of residual stress in AISI 347 welded pipe: a time-of-flight neutron diffraction study
  11. Excellent plasticity revealed in high purity Si steels by the addition of Cr
  12. Phase formation and reaction kinetics in the vanadium– tin system
  13. Microstructure and mechanical properties of Cu–Ag microcomposites for conductor wires in pulsed high-field magnets
  14. Solid–liquid reaction synthesis and simultaneous densification of polycrystalline Ti2AlC
  15. Dislocation glide on non-compact crystal planes in copper
  16. Residual stresses in Cu–Fe –TiC sintered materials after grinding and after shot peening
  17. Mitteilungen/Notifications
  18. Instructions to authors
  19. Richtlinien für autoren
  20. Personen
  21. Bücher/Books
  22. Tagungen/Conferences
  23. Corrigendum
  24. Corrigendum
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