Interface Reaction between Tool Steel and Molten Al Alloy Containing High Mg Content

Abstract:

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.

• Periodical: Defect and Diffusion Forum (Volume 380)
• Pages: 115-119
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.380.115
• Online since: November 2017
• Authors: Young Ok Yoon*, Nam Seok Kim, Bong Hwan Kim, Shae K. Kim
• Keywords: Al Alloy, Die Soldering, Diffusion, Intermetallic Compound, Tool Steel

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