Characterization investigations of a melt-spun ternary Al-8Si-5.1Cu (in wt.%) alloy

M. Lütfi Öveçoglu*, Necip Ünlü, Niyazi Eruslu, Arda Genç

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

A ternary Al-8Si-5.1Cu (in wt.%) alloy was rapidly quenched from the melt at cooling rates between 106 and 107 K/s using the melt-spinning technique. The resulting ribbons were characterized using optical microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and microhardness techniques. On the basis of the Al peak shifts measured in the XRD scans, a solid solubility extension value of 3.83 at.% Si in Al was determined. Whereas SEM investigations showed the presence of dendrites rich in Al, TEM investigations revealed nanosized spherically shaped Si crystals 20-25 nm in size. Both XRD and TEM investigations confirmed the absence of any intermetallic phase formation. The microhardness value of the melt-spun alloy was measured as 201 kg/mm2.

Original languageEnglish
Pages (from-to)3296-3301
Number of pages6
JournalMaterials Letters
Volume57
Issue number21
DOIs
Publication statusPublished - Jul 2003

Keywords

  • Alloys
  • Characterisation methods
  • Melt-spinning
  • Metals
  • Microstructure
  • Solidification
  • Ternary Al-Si-Cu alloy

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