Morphological Variation of Fe/Cr-Rich Intermetallic Phase in Recycled Al-Si Alloy as a Function of Solidification Rate: Time-Resolved Radiography

Bong Hwan Kim; Sang Mok Lee; Hideyuki Yasuda

doi:10.4028/www.scientific.net/MSF.654-656.974

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HomeMaterials Science ForumMaterials Science Forum Vols. 654-656Morphological Variation of Fe/Cr-Rich...

Morphological Variation of Fe/Cr-Rich Intermetallic Phase in Recycled Al-Si Alloy as a Function of Solidification Rate: Time-Resolved Radiography

Abstract:

Effects of Cr addition on morphology of β-Al5FeSi phase formed in recycled aluminum alloy were studied as a function of cooling rate by technology of time-resolved radiography. The Cr addition to iron-contaminated recycled alloys modified the needle-like β-Al5FeSi into faceted dendritic α-AlFeCrSi phase in condition of conventional casting. Time-resolved radiography of the formation of α-AlFeCrSi revealed the transition of its morphology from polyhedron at about 10K/min of cooling rate to equiaxed dendrite of faceted arms at about 50K/min. of cooling rate.

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Periodical:

Materials Science Forum (Volumes 654-656)

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974-977

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.654-656.974

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Online since:

June 2010

Authors:

Bong Hwan Kim, Sang Mok Lee, Hideyuki Yasuda

Keywords:

Aluminium Alloy, Intermetallic, Modification, Radiography, β-Al₅FeSi

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