A Formation Map of Iron-Containing Intermetallic Phases in Recycled Cast Aluminum Alloys

ÇİNKILIÇ, EMRE; Ridgeway, C.D.; Yan, X.; Luo, A.A.

doi:10.1007/s11661-019-05469-6

A Formation Map of Iron-Containing Intermetallic Phases in Recycled Cast Aluminum Alloys

ÇİNKILIÇ E., Ridgeway C., Yan X., Luo A.

Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, cilt.50, sa.12, ss.5945-5956, 2019 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 50 Sayı: 12
Basım Tarihi: 2019
Doi Numarası: 10.1007/s11661-019-05469-6
Dergi Adı: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.5945-5956
Hakkari Üniversitesi Adresli: Hayır

Özet

The cooling rate-dependent modification effect of Mn on the formation of Fe-containing intermetallic phases during solidification of Al-Si-Mg secondary cast aluminum alloys [containing 0.5 to 1 pct Fe (All compositions are in wt pct unless otherwise stated.)] was investigated by CALculation of PHAse Diagrams (CALPHAD) modeling and solidification experiments. The critical Mn concentration required to prevent the formation of detrimental β-Al5FeSi was found to be dependent on both the alloy composition (particularly the Fe/Mn ratio) and the cooling rate. A map of Fe/Mn ratio vs cooling rate was created, to summarize the metallurgical conditions of Fe-rich intermetallic phase formation. By understanding such formation conditions, the microstructure of aluminum castings can be controlled to create low-cost secondary alloys with high Fe content.