Abstract
The microstructure of an eutectic Al-6,3wt.%Ni alloy solidified under transient conditions were analysed in as-cast condition and after a laser surface remelting process. Considering that the laser treatment reaches a small portion of sample surface and provide higher cooling rates (Ṫ) than conventional cast processes, Ṫ had to be calculated with the aid of a computational program. Therefore, microstructure of both as-cast and treated samples were compared. The microstructure of the remelted zone showed cell-like structures, which achieved very refined scale (< 10 μm).
Highlights
Aluminum alloys with the addition of nickel are widely used in aerospace industry, due to its high corrosion and wear resistances, especially under high temperatures[1]
It is known that the microstructure of Al alloys feature various intermetallic compounds in an α-Al matrix[2], which directly determines the mechanical properties performance
The morphology of microstructure can be altered via solidification parameters[3]
Summary
Aluminum alloys with the addition of nickel are widely used in aerospace industry, due to its high corrosion and wear resistances, especially under high temperatures[1]. It is known that the microstructure of Al alloys feature various intermetallic compounds in an α-Al matrix[2], which directly determines the mechanical properties performance. The morphology of microstructure can be altered via solidification parameters[3].
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