The influence of cooling rate and manganese content on the beta-Al5FeSi phase formation and formation and mechanical properties of Al-Si based alloys

• The present study investigates the influence of manganese level and cooling rate on the formation of iron compounds and mechanical properties of Al–9%Si alloys containing 0.3%Fe. It has been established that high cooling rates and Mn additions are not able to totally nullify the formation of β-Al5FeSi-needles onto α-Al15(Fe,Mn)3Si2-Chinese scripts even at Mn:Fe ratio of 2:1, but produces improvement in tensile strength unlike the ductility which suffers a loss with the increment of Mn concentrations.

Nyckelord

Aluminium alloys; Ductility; Intermetallic compounds; Iron; Manganese

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