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On the Influence of Dislocations on Precipitation in an Al–Zn–Mg Alloy

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Published/Copyright: December 2, 2021
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 88 Issue 8

Abstract

The influence of predeformation on the precipitation and on the resulting mechanical properties in an Al–Zn–Mg alloy was studied using a combination of complementary experimental techniques, namely transmission electron microscopy, differential scanning calorimetry, small-angle X-ray scattering and microhardness. The thermomechanical treatment was designed to show a significant effect of deformation on the precipitation process. It was observed that the presence of dislocations during precipitation promoted fast nucleation of the equilibrium η phase in the η2 orientation instead of nucleation of the η′ phase with subsequent transformation to η1 and η4 outside dislocations. The large growth rate of precipitates lying on dislocations provoked a growing precipitatefree zone around dislocations. This resulted in a lower value of peak hardness and a faster overall coarsening kinetics.

Dedicated to Prof. Dr rer. nat. Volkmar Gerold on the occasion of his 75th birthday

A. Deschamps, Y. Brèchet, P. Guyot and F. Livet LTPCM/ENSEEG Domaine Universitaire, BP 75 38402 St Martin d’Hères Cedex France

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Received: 1997-02-26
Published Online: 2021-12-02

© 1997 Carl Hanser Verlag, München

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Aufsätze
  4. Characterization of Aggregates in Very Thin Layers by Small-angle X-ray Scattering Using Grazing Incidence
  5. On the Influence of Dislocations on Precipitation in an Al–Zn–Mg Alloy
  6. Precipitation in Al–Zn–Mg–(Cu, Zr) Alloys
  7. Simultaneous Dissolution and Coarsening of δ′ Precipitates in Al–Li Alloys During DSC Experiments
  8. Deviations from Equilibrium at Remelting Solid/Liquid Interfaces
  9. Constitution of Mn–Al–(Cu, Fe, Ni or C) Alloys Near the Magnetic τ Phase
  10. Early Stages of Decomposition in Al–Ag and Al–Cu
  11. Short-Range Order and the Mode of Slip in Concentrated Cu-based Alloys
  12. Time Dependent Deformation of the Magnesium Alloys AS21 and AZ91 around 100 °C
  13. The Influence of Microstructure on the Mechanical Properties of a Spinodally Decomposed Cu–Ni–Fe Alloy
  14. Search for γ Precipitate Hardenable Quaternary Ll2-Ordered γ′-Intermetallics with Compositions Around Ni3(Al, Si, Ti), (Ni, Co)3(Al, Ti) and (Ni, Co)3(Si, Ti)
  15. Deformation Behaviour of the Single Crystal Superalloy SC16 Under Low Cycle Fatigue Loading
  16. Thermal Fatigue of Components with Compositional Gradients of Multiphase NiAl-X and Alloy IN 738
  17. Mikrostrukturelle Analyse einer betriebsbeanspruchten einkristallinen Flugturbinenschaufel: Bewertung der lokal wirkenden Belastung
  18. Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
  19. Personen
  20. Mitteilung aus dem Materialprüfungsamt Nordrhein-Westfalen
  21. Terminkalender
https://doi.org/10.3139/ijmr-1997-0113

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Aufsätze
  4. Characterization of Aggregates in Very Thin Layers by Small-angle X-ray Scattering Using Grazing Incidence
  5. On the Influence of Dislocations on Precipitation in an Al–Zn–Mg Alloy
  6. Precipitation in Al–Zn–Mg–(Cu, Zr) Alloys
  7. Simultaneous Dissolution and Coarsening of δ′ Precipitates in Al–Li Alloys During DSC Experiments
  8. Deviations from Equilibrium at Remelting Solid/Liquid Interfaces
  9. Constitution of Mn–Al–(Cu, Fe, Ni or C) Alloys Near the Magnetic τ Phase
  10. Early Stages of Decomposition in Al–Ag and Al–Cu
  11. Short-Range Order and the Mode of Slip in Concentrated Cu-based Alloys
  12. Time Dependent Deformation of the Magnesium Alloys AS21 and AZ91 around 100 °C
  13. The Influence of Microstructure on the Mechanical Properties of a Spinodally Decomposed Cu–Ni–Fe Alloy
  14. Search for γ Precipitate Hardenable Quaternary Ll2-Ordered γ′-Intermetallics with Compositions Around Ni3(Al, Si, Ti), (Ni, Co)3(Al, Ti) and (Ni, Co)3(Si, Ti)
  15. Deformation Behaviour of the Single Crystal Superalloy SC16 Under Low Cycle Fatigue Loading
  16. Thermal Fatigue of Components with Compositional Gradients of Multiphase NiAl-X and Alloy IN 738
  17. Mikrostrukturelle Analyse einer betriebsbeanspruchten einkristallinen Flugturbinenschaufel: Bewertung der lokal wirkenden Belastung
  18. Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
  19. Personen
  20. Mitteilung aus dem Materialprüfungsamt Nordrhein-Westfalen
  21. Terminkalender
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