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TitleEffect of grain and secondary phase morphologies in the mechanical and damping behavior of Al7075 alloys
Author(s)Puga, Hélder
Carneiro, V. H.
Barbosa, J.
Soares, Delfim
Keywordsultrasonic treatment
intermetallic phases
grain refinement
mechanical properties
Issue date2016
PublisherKorean Institute of Metals and Materials
JournalMetals and Materials International
Abstract(s)The present study evaluates the role of the microstructure in the static and dynamic mechanical behavior of as-cast Al7075 alloy promoted by ultrasonic treatment (US) during solidification. The characterization of samples revealed that US treatment promoted grain and intermetallics refinement, changed the shape of the intermetallic phases (equilibrium phases of soluble M and/or T (Al, Cu, Mg, Zn) and their insoluble Al-Cu-Fe compounds) and lead to their uniform distribution along the grain boundaries. Consequently, the mechanical properties and damping capacity above critical strain values were enhanced by comparison with values obtained for castings produced without US vibration. This results suggest that the grain and secondary phases refinement by US can be a promising solution to process materials to obtain high damping and high strength characteristics.
Appears in Collections:DEM - Artigos em revistas de circulação internacional com arbitragem científica

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