The influence of ageing parameters on microhardness, electrical conductivity and microstructure of some Al-Mg-Si alloys
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Date
2024
Authors
Stamenković, Uroš
Marković, Ivana
Ćosović, Vladan
Markoli, Boštjan
Journal Title
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Publisher
University of Belgrade, Technical faculty in Bor
Source
Proceedings [Elektronski izvor] - 31st International conference Ecological Truth & Environmental Research - EcoTER'24, Sokobanja, Serbia, 18-21 June 2024, 2024, 466-471
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Abstract
This paper investigates the influence of ageing parameters (temperature and time) on the microhardness, electrical conductivity and structural properties of two Al-Mg-Si aluminium alloys. After the applied heat treatment, both microhardness and electrical conductivity were measured. Optical microscopy was used to investigate the microstructures after ageing. The heat treatment began by solutionizing the samples at 550°C for 1 hour, followed by quenching in ice water. Samples were then aged at two separate temperatures, 180°C and 200°C, for 1–8 hours. The results indicate that with the increase in ageing time, the microhardness gradually increases up to a maximum and then decreases, while the electrical conductivity continuously increases. Analysis on the optical microscope shows that with longer ageing, there is precipitation of a larger amount of the strengthening phases due to more intense diffusion of alloying elements from the solid solution.
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Keywords
Al-Mg-Si, microhardness, electrical conductivity, ageing, microstructure
Citation
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Scopus
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ISBN
978-86-6305-152-2
License
CC-BY-NC-ND