LAUSR

Interface reaction between SKD61 and three Al melts at 973 K was investigated in this study. In pure Al and A380 alloy, soldering occurred on the samples. Pure Al showed two separated soldering areas consisting of Fe-Al based intermetallic phases, mainly FeAl3. A380 alloy indicated the expanded soldering area consisting of Al3Fe and two AlFeSi based intermetallic phases. Al-10mass%Mg alloy showed the absence of soldering, but a formation of a few Fe-Al intermetallic phases. This would be attributed to weakened interaction between Fe and Al caused by Mg enrichment. Microstructures near soldering of pure Al and A380 also showed the precipitations considered as Al3Fe and AlFeSi intermetallic compounds, respectively. However, in Al-10mass%Mg alloy, there is only intermetallic compound including Mg, V and Ca without Al3Fe.