The influence of the ageing temperature on different properties of the EN AW-7075 aluminium alloy
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Date
2023
Authors
Stamenković, Uroš
Ivanov, Svetlana
Marković, Ivana
Gorgievski, Milan
Božinović, Kristina
Kovačević, Avram
Journal Title
Journal ISSN
Volume Title
Publisher
Consejo Superior de Investigaciones Científicas (CSIC), Spain
Source
Revista De Metalurgia
Volume
59
Issue
1
Abstract
The influence of the ageing temperature on the hardness, electrical conductivity, thermal diffusivity and thermal conductivity of the EN AW-7075 aluminium alloy was studied in this paper. After solution treating the alloy at 480 °C for 1 h and quenching it in ice water, the investigated alloy was characterized using Differential Thermal Analysis (DTA) in order to determine the optimal temperatures for the isochronal ageing treatments. Afterwards, isochronal ageing was conducted at the temperature range of 110 °C-250 °C for 30 min The hardness, electrical conductivity, thermal diffusivity, thermal conductivity and microstructural features were investigated during the ageing treatments. Hardness had a peak value after ageing at 150 °C, while other properties gradually increased with the ageing temperature. Microstructural investigation of the aged alloy by SEM-EDS revealed the existence of precipitated phases that appear homogenously distributed in the microstructure.
Description
Keywords
Ageing, Electrical conductivity, EN AW-7075, Hardness, Thermal properties
Citation
DOI
10.3989/revmetalm.238
Scopus
ISSN
0034-8570
1988-4222
1988-4222
ISBN
License
CC-BY