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K. N. Kalashnikov, T. A. Kalashnikova, S. V. Fortuna, A. V. Vorontsov, V. A. Krasnoveykin, A. V. Chumaevskii

ON THE EVOLUTION OF THE MICROSTRUCTURE AND PHASE COMPOSITION IN THE FRICTION STIR WELDED AA 2024 ALLOY

The structure formed in thermally hardened aluminum alloys during friction stir welding is studied by optical metallography, SEM, and TEM. As a result, it has been found that the structure of the material in the stir zone is fine-grained, with the mean grain size ranging 3.5 to 5.0 μm. The presence of several types of secondary phases differing in their mean grain size, structure, distribution in the bulk of the material, and chemical composition has been revealed.

Acknowledgements: The work was performed within the Program of Basic Scientific Research of the State Academies of Sciences for 2013–2020, line of research III.23, and financially supported by the RFBR, project р_а No. 16-48-700652.

Keywords: friction stir welding, deformable thermally hardenable, aluminum alloy, microstructure, intermetallic compounds, phase composition
         

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Founder:  Institute of Engineering Science, Russian Academy of Sciences (Ural Branch)
Chief Editor:  E.S. Gorkunov
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