Nucleation kinetics during the solidification of aluminum alloys

N. Iqbal, N. H. van Dijk, S. E. Offerman, M. P. Moret, L. Katgerman, G. J. Kearley

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The nucleation kinetics of individual grains during solidification of an aluminium alloy are experimentally investigated by X-ray diffraction at a synchrotron source. The investigated aluminium alloy contained solute titanium along with micrometer size TiB2 particles, which act as substrates for heterogeneous nucleation of aluminium grains during solidification. The nucleation rate of aluminium grains during solidification is measured by different cooling rates ranging from 1 to 40 K/min. The measurements indicate that for the continuous cooling, the nucleation rate strongly decreases with time. The nucleation process is complete for solid fractions below 30% for all cooling rates. The maximum nucleation rate significantly increases with increasing cooling rates.

Original languageEnglish
Pages (from-to)3640-3643
Number of pages4
JournalJournal of Non-Crystalline Solids
Volume353
Issue number32-40
Early online date25 Jul 2007
DOIs
Publication statusPublished - 15 Oct 2007
Externally publishedYes

Keywords

  • Amorphous metals, metallic glasses
  • Diffraction and scattering measurements
  • Glass formation
  • Liquid alloys and liquid metals
  • Liquid crystals and molecular liquids
  • Nucleation
  • Short-range order
  • X-ray diffraction
  • X-rays

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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  • Cite this

    Iqbal, N., van Dijk, N. H., Offerman, S. E., Moret, M. P., Katgerman, L., & Kearley, G. J. (2007). Nucleation kinetics during the solidification of aluminum alloys. Journal of Non-Crystalline Solids, 353(32-40), 3640-3643. https://doi.org/10.1016/j.jnoncrysol.2007.05.126