Real-time observation of grain nucleation and growth during solidification of aluminium alloys

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

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

The crystallisation kinetics of liquid aluminium-titanium alloys with microscopic TiB2 particles added to refine the grain size in the solidified material was studied by X-ray diffraction measurements at a synchrotron source. Real-time observation of the formation and growth of individual grains reveals the central role played by the added TiB2 particles during solidification. Prior to the main transformation, weak reflections of a metastable TiAl3 phase were detected. This observation finally pinpoints the highly debated mechanism responsible for enhanced grain nucleation in Al-Ti-B alloys.

Original languageEnglish
Pages (from-to)2875-2880
Number of pages6
JournalActa Materialia
Volume53
Issue number10
Early online date20 Apr 2005
DOIs
Publication statusPublished - 1 Jun 2005
Externally publishedYes

Keywords

  • Aluminium alloys
  • Grain refinement
  • Solidification
  • TiB
  • X-ray diffraction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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    Iqbal, N., Van Dijk, N. H., Offerman, S. E., Moret, M. P., Katgerman, L., & Kearley, G. J. (2005). Real-time observation of grain nucleation and growth during solidification of aluminium alloys. Acta Materialia, 53(10), 2875-2880. https://doi.org/10.1016/j.actamat.2005.02.045