Siberian Federal University, Krasnoyarsk, Russia

I. L. Konstantinov, Candidate of Technical Sciences, Associate Professor of Metal Forming Department, e-mail: ilcon@mail.ru
P. O. Yuryev, Head of the Laboratory of Low-Carbon Metallurgy and Energy, e-mail: pashka_urew@mail.ru
Yu. V. Baykovskiy, Assistant, Post-Graduate Student of Metal Forming Department, e-mail: baykovskjy98@gmail.com
T. A. Orelkina, Candidate of Technical Sciences, Associate Professor of Metal Science and Heat Treatment of Metals named after V. S. Biront Department, e-mail: torelkina@sfu-kras.ru

The structure and properties of an industrial large-size ingot of alloy 1580, obtained by semi-continuous casting, have been studied. Evidence has been presented which indicates that the ingot exhibits a fine crystalline structure and is devoid of primary intermetallides Al3(Sc, Zr). The phase composition of the ingot subsequent to annealing has been ascertained. The present study investigates the modes of hot and cold rolling of the ingot to obtain 1 mm thick sheets. The structure of the resulting sheets, after undergoing the process of annealing, has been shown to represent elongated fibres of grains. These are characterised by the presence of dispersed inclusions of excess phases along their boundaries. It has been established that, upon subjecting sheets to annealing temperatures of 225, 250 and 275 °C, a fibrous structure is observed in the absence of any indications of recrystallisation. However, at an annealing temperature of 300 °C, the presence of single recrystallized grains is detected within the structure. Furthermore, at an annealing temperature of 350 °C, the formation of a recrystallized structure is promoted throughout the volume of the sheet. The graphs presented herein illustrate the dependence of the mechanical properties of annealed cold-rolled sheets on the annealing temperature. The investigation revealed that the plasticity resource of hot-rolled sheets from alloy 1580 is approximately 80% when subjected to cold rolling.

The study was supported by the Russian Science Foundation (project № 25-19-20133, https://rscf.ru/project/25-19-20133/), and the Krasnoyarsk Regional Science Foundation.

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