Effect of rotating magnetic field and manganese on the formation of iron-containing intermetallic compounds in Al-Si alloy

Yumeng Zhang (1) , K Svynarenko (1) , Q Zou (1) , J Jie (1) , Tianyi Li (1)

1 School of Material Sciences and Engineering

The acicular β-AlSiFe phase is common but detrimental iron-containing intermetallic phase in Al-Si alloys. In this study, rotating magnetic field (RMF) and manganese neutralizer were used to modify the β-phase in Al-12%Si-2%Fe alloy. The results showed that the manganese addition caused the morphological transformation of iron phase from β-AlFeSi to α-AlSiFeMn with the relation of transition rate to the manganese content. The total transformation was only achieved when Mn/Fe ratio is 1.1. The application of RMF facilitated the formation of α-AlSiFeMn phase even at lower Mn/Fe ratio, economizing manganese consumption and preventing the increase in total number of intermetallic compounds. The modification and facilitation mechanisms of RMF were based on the forced convection induced by electromagnetic force.

Mots clés: Rotating magnetic field; Manganese neutralizer; Iron-containing intermetallic compound; Al-Si alloy

Domaines: Sciences de l'ingénieur [physics]

Yumeng Zhang, K Svynarenko, Q Zou, J Jie, Tianyi Li. Effect of rotating magnetic field and manganese on the formation of iron-containing intermetallic compounds in Al-Si alloy. 8th International Conference on Electromagnetic Processing of Materials, Oct 2015, Cannes, France. ⟨hal-01331855⟩