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Kinetics of dynamic recrystallization in cobalt: A study using the Avrami relation
Author(s) -
Sarkar A.,
Chakravartty J. K.,
Paul B.,
Suri A. K.
Publication year - 2011
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201127001
Subject(s) - materials science , softening , dynamic recrystallization , avrami equation , crystallite , recrystallization (geology) , strain rate , deformation (meteorology) , cobalt , kinetics , flow stress , composite material , thermodynamics , metallurgy , hot working , microstructure , physics , geology , paleontology , melting point , quantum mechanics , enthalpy of fusion
The progress of dynamic recrystallization (DRX) in polycrystalline wrought cobalt (Co) during hot deformation has been studied using a newly developed mechanical approach. The approach is based upon the analysis of the flow curve of the material to quantify the softening which is attributed to DRX. Avrami plots for Co during DRX have been generated using stress–strain curves under various deformation conditions. The values of the Avrami time exponents are ∼3.0. The dependence of the time of half‐softening on strain rate is found to exhibit similar behavior to that of other materials.