Effect of HF and ER additions on the mechanical properties and microstructure of AL-MG-SC-ZR system alloys


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Abstract

The study addresses the effect of 1580 and 1590 alloys cold rolled strip annealing practices on the alloys’ grain structure and mechanical properties. The 1590 alloy differs from the 1580 alloy by hafnium and erbium additions. Samples of such alloys were produced by casting into a steel mold. After that they were homogenized during 4 h at 440°С. Then the samples were hot rolled at 440°С, with further cold rolling to 2 mm, with the cumulative percentage reduction equal to 66%. The cold rolled strip was annealed at the temperature ranging from 330 to 440°С with 1 h soaking. The sizes and morphology of Al3Sc strengthening nanoparticles were examined in homogenized condition using transmission microscopy. The mechanical properties and grain structure were defined in cold rolled and annealed conditions. During homogenizing annealing in the 1590 alloy finer strengthening nanoparticles are formed compared to the 1580 alloy. Such features of the microstructure can be explained by the presence of erbium, promoting formation of additional Al3Sc-type nanoparticles nuclei, and hafnium, preventing their further growth. Non-recrystallized structure was identified in both alloys after cold rolling and final annealing. The 1590 alloy has better mechanical properties, regardless of the annealing temperature, which is explained by a larger portion and smaller size of strengthening nanoparticles.

About the authors

E. V. Aryshenskii

Samara National Research University

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

Doctor of Science (Engineering), PhD, Leading Researcher of ONIL-4

Russian Federation

V. Yu. Aryshenskii

Samara National Research University

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

Doctor of Science (Engineering), Chief Researcher of ONIL-4

Russian Federation

A. A. Ragazin

Samara National Research University

Email: aleksander.ragazin@samara-metallurg.ru
ORCID iD: 0000-0002-6762-7436

Postgraduate Student of the Department of Metal Technology and Aviation Materials; Engineer of ONIL-4

Russian Federation

D. Yu. Rasposienko

M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences

Email: rasposienko@imp.uran.ru
ORCID iD: 0000-0002-7670-9054

Candidate of Science (Engineering), Leading Researcher, Head of the Laboratory of Non-ferrous Alloys

Russian Federation

F. V. Grechnikov

Samara National Research University

Email: gretch@ssau.ru
ORCID iD: 0000-0002-3767-4004

Academician of the Russian Academy of Sciences, Doctor of Science (Engineering), Head of the Department of Metal Forming

Russian Federation

V. V. Makarov

M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences;
Samara National Research University

Email: makarov@imp.uran.ru
ORCID iD: 0000-0002-7306-3657

Research Associate;
Junior Researcher of ONIL-4

Russian Federation

S. V. Konovalov

Samara National Research University;
Siberian State Industrial University

Email: konovalov@sibsiu.ru
ORCID iD: 0000-0003-4809-8660

Doctor of Science (Engineering), Chief Researcher of ONIL-4;
Vice-Rector for Scientific and Innovative Activities

Russian Federation

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