Phase transformation in Al-Cu-Fe alloys produced by induction fusion
by H. Boularas; M.Y. Debili
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 8, No. 4/5, 2013

Abstract: Structural characteristics and thermal behaviour of the conventionally solidified Al-Cu-Fe alloys prepared by magnetic induction melting with nominal compositions of Al₈₀Cu₁₄Fe₆, Al₆₅Cu₂₃Fe₁₂ and Al₇₂Cu₁₃Fe₁₅ were investigated by scanning electron microscopy, X-ray diffraction, optical micrographs and differential thermal analysis. The icosahedral quasicrystalline (i-QC) phase is obtained in Al₈₀Cu₁₄Fe₆ alloy only after heat treatment at 500°C contrarily to Al₆₅Cu₂₃Fe₁₂ and Al₇₂Cu₁₃Fe₁₅ and coexists with other crystalline intermetallic phases: cubic β-Al(Cu,Fe), monoclinic λ-Al₁₃Fe₄ and tetragonal θ-Al₂Cu. Vickers Microhardness variation with alloy composition as-solidified and heat treated has been also used in this work to determine the intrinsic mechanical hardening of the Al-Cu-Fe alloys.

Online publication date: Mon, 07-Oct-2013

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