Evolution of microstructure during hot incremental disk rolling of a nickel-based super-alloy

Evolution of microstructure during hot incremental disk rolling of a nickel-based super-alloy

DINÇER Mehmet Şamil, OZCATALBAS Mustafa, ACAR Sadik Sefa, MUSIC Omer, ŞIMŞIR Caner

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Abstract. In the aerospace industry, the turbine disk plays a crucial role. Controlling the average grain size during the hot forming of nickel-based superalloys such as Inconel 718 is critical for turbine disk production. Recrystallization is primarily responsible for evolution of microstructure during a hot forming process. In the current study, Finite Element Method (FEM) is employed to assess grain size evolution during an incremental disk rolling process. FEM simulations are used to obtain temperature, strain and strain rate distributions. Then, utilizing these deformation distributions, recrystallization and consequent average grain size distributions are calculated using Johnson-Mehl-Avrami-Kolmogorov (JMAK) equations. Simulations are conducted for different spindle rates of the workpiece. This process is sensitive to the temperature and meta-dynamic recrystallization. Results show that temperature increases with the spindle rate due to the inelastic heat generation. Also a higher grain size variation through thickness is obtained for the simulation with lower spindle rate since meta-dynamic recrystallization fraction is higher.

Keywords
Hot Process, Recrystallization, FEM, JMAK

Published online 4/19/2023, 8 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: DINÇER Mehmet Şamil, OZCATALBAS Mustafa, ACAR Sadik Sefa, MUSIC Omer, ŞIMŞIR Caner, Evolution of microstructure during hot incremental disk rolling of a nickel-based super-alloy, Materials Research Proceedings, Vol. 28, pp 667-674, 2023

DOI: https://doi.org/10.21741/9781644902479-72

The article was published as article 72 of the book Material Forming

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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