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Journal Articles Metallurgical and Materials Transactions A Year : 2013

Modeling Grain Boundary Motion and Dynamic Recrystallization in Pure Metals

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. (c) The Minerals, Metals & Materials Society and ASM International 2013

Dates and versions

emse-00967248 , version 1 (28-03-2014)

Identifiers

Cite

Julien Favre, D. Fabregue, David Piot, Ning Tang, Yuichiro Koizumi, et al.. Modeling Grain Boundary Motion and Dynamic Recrystallization in Pure Metals. Metallurgical and Materials Transactions A, 2013, 44A (Issue : 13), pp.5861-5875. ⟨10.1007/s11661-013-1914-5⟩. ⟨emse-00967248⟩
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