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Microstructure and age-hardening effects of aluminium alloys with additions of scandium and zirconium

  • Rolf Galun EMAIL logo , Barry Leslie Mordike , Thorsten Maiwald , Bohumil Smola , Robert Mergen , Markus Manner and Walter Uitz
Published/Copyright: February 10, 2022
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 95 Issue 12

Abstract

The aim of the work presented in this report was to produce age-hardenable aluminium alloys containing scandium and zirconium by a casting process with similar cooling conditions like an industrial casting process. Microstructure, precipitation structure and age-hardening response of different alloys with up to 0.4 wt.% Sc and Zr were investigated. Age-hardening experiments from the as-cast condition without solution annealing showed a significant increase of hardness of about 100% for Sc-rich alloys and of 50% for Zr-rich alloys compared to the as-cast condition. TEM investigations revealed the formation of precipitates of ternary Al3(ScxZr1–x) phases with a cubic cP4 crystal structure. In addition to the strengthening effect, a high thermal stability especially of the precipitates in Zr-rich alloys up to 400 °C let these alloys look very promising for high-temperature applications.

Keywords: Aluminium; Scandium; Zirconium; Age hardening; Precipitation structure
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Received: 2004-03-15
Accepted: 2004-09-01
Published Online: 2022-02-10

© 2004 Carl Hanser Verlag, München

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  20. Microstructure and age-hardening effects of aluminium alloys with additions of scandium and zirconium
  21. Notifications / Mitteilungen
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https://doi.org/10.1515/ijmr-2004-0206
Keywords for this article
Aluminium; Scandium; Zirconium; Age hardening; Precipitation structure

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Editorial
  4. Werner-Köster-Preis
  5. den Werner-Köster-Preis 2003
  6. Festabend zum 85. Geburtstag der DGM
  7. Festabend zum 85. Geburtstag der DGM
  8. Articles Applied
  9. NiAl – material for the application in gas turbines
  10. High-temperature creep behavior and hot-pressing consolidation of NiAl
  11. Direct Strip Casting of Magnesium
  12. Thermo-mechanical analysis of cast/mould interaction in casting processes
  13. Aluminum–Lithium alloy development for thixoforming
  14. On the influence of heavy warm reduction on the microstructure and mechanical properties of a medium-carbon ferritic –pearlitic steel
  15. Thermodynamic assessment of the Dy–Mg system
  16. Influence of pre-straining on mechanical properties of HSLA steel by using ball indentation technique
  17. Fabrication and application of co-continuous Al2O3/Al composite by reactive infiltration of molten Al into the preform of SiO2 with cordierite addition
  18. Articles Basic
  19. Simulation of cellular-dendritic solidification structures of binary alloys in three-dimensional growth using a multiparticle diffusion-limited aggregation model
  20. Microstructure and age-hardening effects of aluminium alloys with additions of scandium and zirconium
  21. Notifications / Mitteilungen
  22. Personal/Personelles
  23. Materials Week
  24. News/Aktuelles
  25. Books/Bücher
  26. Conferences / Konferenzen
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