Efecto de la precipitación de fases metaestables en las propiedades termofísicas y mecánicas de la aleación EN AW-6082

Uroš Stamenković; Svetlana Ivanov; Ivana Marković; Ljubiša Balanović; Milan Gorgievski

doi:10.3989/revmetalm.156

Authors

Uroš Stamenković University of Belgrade https://orcid.org/0000-0002-7579-2159
Svetlana Ivanov University of Belgrade https://orcid.org/0000-0002-5326-0602
Ivana Marković University of Belgrade https://orcid.org/0000-0003-4431-9921
Ljubiša Balanović University of Belgrade https://orcid.org/0000-0002-3551-6731
Milan Gorgievski University of Belgrade https://orcid.org/0000-0002-9899-719X

DOI:

https://doi.org/10.3989/revmetalm.156

Keywords:

Aging, Aluminum alloys, EN AW-6082, Heat treatment, Thermal properties

Abstract

The effect of precipitation of metastable phases on the thermophysical and mechanical properties of the EN AW-6082 alloy was studied in this paper. After solid solution treatment and quenching in ice water samples were subjected to DSC analysis and thermal investigation with the aim to define optimal temperatures for isochronal annealing. Isochronal annealing was conducted at temperatures ranging from 160–330 °C for two annealing times – 30 and 60 minutes. Electrical conductivity, hardness, microhardness and structural properties were investigated during the isochronal aging treatment. Mechanical properties achieved peak values during aging at 230 °C for 30 minutes and at 220 °C for 60 minutes, respectively. Electrical conductivity gradually increased with an increase in aging temperature due to precipitation from the solid solution. Microstructural investigations by SEM-EDS confirmed the existence of precipitated phases and their distribution throughout the investigated samples.

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