Abstract
The current study proposes a new approach of modeling discontinuous dynamic recrystallization in pure copper and cobalt based on the inverse analysis of experimental data. This approach comprises two steps: First, the mobility of grain boundaries is determined by a mean-field model in the steady state regime, then in a second step the information collected (mobility, nucleation frequency) is used to determine the mechanical behavior and the grain size change. The nucleation criterion is reformulated in a more general expression, and a new expression of the nucleation frequency with a single empirical parameter is proposed. The model predicts the stress–strain curves and the evolution of mean grain size, and is in good agreement with experimental data for both copper and cobalt. The modeling procedure requires a minimum of initial material parameters and could be especially attractive in the case of complex metals and alloys for which these parameters are unknown.
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Acknowledgments
The authors acknowledge the Ministry of Education, Science and Culture of Japan and the Region Rhone-Alpes in France for the financial support. The work was performed within the frame of the Japanese-French joint laboratory ELyT lab. The authors gratefully acknowledge C.R. Hutchinson and F. Montheillet for discussions during this work.
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Manuscript submitted January 15, 2013.
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Favre, J., Fabrègue, D., Piot, D. et al. Modeling Grain Boundary Motion and Dynamic Recrystallization in Pure Metals. Metall Mater Trans A 44, 5861–5875 (2013). https://doi.org/10.1007/s11661-013-1914-5
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DOI: https://doi.org/10.1007/s11661-013-1914-5