Avalanches and Scaling in Plastic DeformationPhysical Review Letters (2004)
AbstractPlastic deformation of crystalline materials is a complex nonhomogeneous process characterized by avalanches in the motion of dislocations. We study the evolution of dislocation loops using an analytically solvable phase-field model of dislocations for ductile single crystals during monotonic loading. The distribution of dislocation loop sizes is given by P(A)∼A−σ, with σ=1.8±0.1. The exponent is in agreement with those found in acoustic emission experiments. This model also predicts a range of macroscopic behaviors in agreement with observation, including hardening with monotonic loading, and a maximum in the acoustic emission signal at the onset of yielding.
Publication DateSeptember 14, 2004
Citation InformationMarisol Koslowski, Richard Alan Lesar and Robb Thomson. "Avalanches and Scaling in Plastic Deformation" Physical Review Letters Vol. 93 Iss. 125502 (2004)
Available at: http://works.bepress.com/richard_lesar/5/