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Use of Heterogenization for Improving Alloy AA5083 Superplasticity Indices

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Metallurgist Aims and scope

The microstructure and superplasticity indices are compared for specimens of alloy AA5083 prepared by two technologies: using intermediate heterogenization annealing and without it. As a result of heterogenization β -phase is separated that during recrystallization stimulates new grain growth, and therefore the grain size within specimens is smaller by almost a factor of two than for specimens not subjected to annealing. Use of heterogenization annealing provides a relative elongation up to 650% at 550°C and a constant strain rate of 1·10−3 sec−1, and lower residual porosity. Sheet prepared by this technology makes it possible to increase forming rate by several factors.

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Work was performed with financial support of the RF Ministry of Education and Science within the scope of the main part of a state2 assignment for higher education establishments for 2017-2019 No. 11.7172.2017/8.9.

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Authors and Affiliations

  1. National Research Technology University MISiS, Moscow, Russia

    V. K. Portnoi, O. A. Yakovtseva, A. A. Kishchik, S. V. Medvedeva & A. V. Mikhailovskaya

  2. NIU VShÉ, Moscow Institute of Electronics and Mathematics, Moscow, Russia

    A. D. Kotov

Authors
  1. V. K. Portnoi
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  2. O. A. Yakovtseva
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  3. A. A. Kishchik
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  4. A. D. Kotov
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  5. S. V. Medvedeva
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  6. A. V. Mikhailovskaya
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Corresponding author

Correspondence to V. K. Portnoi.

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Translated from Metallurg, Vol. 62, No. 5, pp. 45–49, May 2018. Original article submitted June 27, 2017.

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Portnoi, V.K., Yakovtseva, O.A., Kishchik, A.A. et al. Use of Heterogenization for Improving Alloy AA5083 Superplasticity Indices. Metallurgist 62, 449–455 (2018). https://doi.org/10.1007/s11015-018-0680-4

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  • DOI: https://doi.org/10.1007/s11015-018-0680-4

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