The Portevin-Le Chatelier Effect and Beyond
Résumé
This chapter presents a review of investigations into the complexity of the plastic flow associated with the Portevin-Le Chatelier
effect, or jerky flow, in traditional alloys that have basic elements determining the crystal lattice of the material. The main accent is put on
the illustration of the state-of-the art of this research under the angle of distinct regimes of collective dislocation dynamics, e.g., self-organized
criticality, deterministic chaos, or synchronization. Finally, an extension of the research toward finer scales, which are resolved using acoustic emission and image correlation techniques, is discussed.
Mots clés
Portevin-Le Chatelier effect
jerky flow
serrated flow
plastic instability
dynamical strain aging
deformation bands
strain localization
strain localization waves
avalanches
self-organized criticality
deterministic chaos
synchronization
relaxation oscillations
fluctuation scaling
acoustic emission
high-frequency local extensometry
digital image correlation
statistical distributions
multifractal analysis
self-similarity
scale invariance
power-law scaling
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