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Metallurgist
Published in: Metallurgist 9-10/2023

24-02-2023

Effect of Thermal Deformation Treatment Regimes on Al–4.5Zn–4.5Mg–1Cu–0.12Zr–0.1Sc Alloy Structure and Properties

Authors: M. G. Khomutov, A. V. Pozdniakov, M. V. Glavatskikh, R. Yu. Barkov, A. Yu. Churyumov, A. Ya. Travyanov

Published in: Metallurgist | Issue 9-10/2023

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Abstract

The microstructure and change in strength of Al–4.5%Zn–4.5%Mg–1%Cu–0,12%Zr–0,1%Sc alloy during annealing after hot deformation in the temperature range 300–450°C are studied. It is established that recrystallization hardly occurs during annealing: at temperatures of 350°C and 400°C softening does not occur, which microstructural studies confirm. During annealing at 450°C yield strength is reduced by increasing the proportion of recrystallized volume to 15%. The structure formed after hot and cold rolling and subsequent annealing has a significant effect on sheet ageing kinetics compared with an ingot. The maximum effect of ageing in the sheet is observed after treatment at 125°C, whereas similar strengthening is achieved in an ingot at 150°C. Test alloy after hot and cold rolling, quenching and ageing at 125°C for 28 hours exhibits a high level of mechanical properties: yield strength 480 ± 5 MPa; ultimate strength 545 ± 7 MPa; relative elongation 6.3 ± 0.4%.
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Footnotes
1
The author thanks candidate of technical science V. V. Chevererikin (NITU MISiS) for performing EBSD analysis.
 
2
The authors thank candidate of engineering science A. S. Prosviryakova (NITU MISiS) for performing tensile mechanical tests.
 
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Metadata
Title
Effect of Thermal Deformation Treatment Regimes on Al–4.5Zn–4.5Mg–1Cu–0.12Zr–0.1Sc Alloy Structure and Properties
Authors
M. G. Khomutov
A. V. Pozdniakov
M. V. Glavatskikh
R. Yu. Barkov
A. Yu. Churyumov
A. Ya. Travyanov
Publication date
24-02-2023
Publisher
Springer US
Published in
Metallurgist / Issue 9-10/2023
Print ISSN: 0026-0894
Electronic ISSN: 1573-8892
DOI
https://doi.org/10.1007/s11015-023-01435-1

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