ON STRUCTURAL TRANSFORMATIONS IN ALUMINUM ALLOY DEFORMATION

1 KITAEVA Daria
Co-authors:
1 KODZHASPIROV Georgii 2 RUDAEV Yakov
Institutions:
1 Peter the Great St. Petersburg Polytechnic University, 195251, Politechnicheskaya Str. 29, St. Petersburg, Russia; e-mail: dkitaeva@mail.ru
2 Kyrgyz-Russian Slavic University, 720000, Kievskaya Str. 44, Bishkek, Kyrgyzstan; e-mail: rudaev36@mail.ru
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
1426-1431
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
83 views / 33 downloads
Abstract

The dynamic superplasticity of aluminum alloys is considered from the point of view of the nonequilibrium phase transition theory. The macrokinetic analysis of superplastic deformation mechanisms is carried out on the basis of the model representing stress, temperature and kinematic characteristics relationship, with energy function of the state being considered in the form of assembly catastrophe potential. Analytical expression is proposed for the function of aluminum alloy sensitivity to the structural transformations, which are connected, in superplasticity conditions, with dynamic recrystallization mechanism. During recrystallization the grain is split and the structure becomes fine-grained. The interconnection of this expression with the evolutionary equations of the model describing alloy deformation regularities in the wide temperature strain-rate ranges, including superplasticity, is presented.

Keywords: nonequilibrium phase transition theory, dynamic superplasticity, aluminum alloys, dynamic recrystallization

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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