Effect of erbium and hafnium microalloying on the formation of Al3Sc particles in aluminium alloy with a high magnesium content

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Abstract

The paper studies the effect of hafnium and erbium additives on the microstructure formation during heat treatment of aluminium alloys with a high magnesium content additionally alloyed with scandium and zirconium. For the study, ingots of aluminium alloys with a high content of magnesium alloyed with scandium, erbium and hafnium with a content in the ranges of 0.03–0.16 % and 0.05–0.16 %, respectively, were produced by casting in a steel chill mould. After casting, the samples were treated with heat at a temperature of 370 and 440 °C with a holding time of 2 to 96 h. Changes in microhardness depending on the heat treatment were studied. For 1590-3 and 1590-4 alloys in the as-cast condition and after heat treatment at a temperature of 440 °C for 2 and 48 h, the fine microstructure and coarse intermetallic compounds were studied using transmission microscopy. The study found that additions of hafnium and erbium lead to an increase in microhardness due to a decrease in the size and an increase in the number of Al3Sc nanoparticles. After heat treatment at a temperature of 440 °C for 4 h, Al3Sc particles of the same size (8 nm) and density precipitate in all the alloys under study. However, with an increase in the holding time in the alloy with a lower hafnium content and a higher erbium content, the particle size increases by 2 times compared to the particles of the alloy where the hafnium content is higher and the erbium content is low.

About the authors

Aleksandr A. Ragazin

Academician S.P. Korolev Samara National Research University

Email: sanekragazin63@mail.ru
ORCID iD: 0000-0002-6762-7436

engineer of Aviation Materials Study Industrial Research Laboratory (ONIL-4)

Россия, 443086, Russia, Samara, Moskovskoye Shosse, 34

Evgeny V. Aryshenskiy

Siberian State Industrial University

Author for correspondence.
Email: arishenskiy_ev@sibsiu.ru
ORCID iD: 0000-0003-3875-7749

Doctor of Sciences (Engineering), PhD, Associate Professor, chief researcher of Scientific Research Department

Россия, 654007, Russia, Novokuznetsk, Kirov Street, 42

Vladimir Yu. Aryshenskiy

Academician S.P. Korolev Samara National Research University

Email: arysh54@mail.ru
ORCID iD: 0000-0001-6869-4764

Doctor of Sciences (Engineering), Professor, chief researcher of Aviation Materials Study Industrial Research Laboratory (ONIL-4)

Россия, 443086, Russia, Samara, Moskovskoye Shosse, 34

Dmitry Yu. Rasposienko

M.N. Mikheev Institute of Metal Physics of the Ural Branch of RAS

Email: dmitrijrasp@gmail.com
ORCID iD: 0000-0002-7670-9054

PhD (Engineering), senior researcher of the Laboratory of Non-ferrous Alloys

Россия, 620108, Russia, Yekaterinburg, Sofya Kovalevskaya Street, 18

Sergey V. Konovalov

Academician S.P. Korolev Samara National Research University; Siberian State Industrial University

Email: konovalov@sibsiu.ru

Doctor of Sciences (Engineering), Professor, chief researcher of Aviation Materials Study Industrial Research Laboratory (ONIL-4), Pro-rector for Research and Innovative Activities

Россия, 443086, Russia, Samara, Moskovskoye Shosse, 34; 654007, Russia, Novokuznetsk, Kirov Street, 42

Inzil D. Bakhtegareev

Academician S.P. Korolev Samara National Research University

Email: inzilbah@ya.ru
ORCID iD: 0009-0004-3081-9049

master

Россия, 443086, Russia, Samara, Moskovskoye Shosse, 34

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Copyright (c) 2025 Ragazin A.A., Aryshenskiy E.V., Aryshenskiy V.Y., Rasposienko D.Y., Konovalov S.V., Bakhtegareev I.D.

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