We pose an experimental model for hot deformation that, in complexity, falls between a homogeneous laboratory test and an industrial process. Our objective is to document a transition between two distinct modes of thermally-activated deformation: diffusion controlled solute drag and hardening with concurrent recovery of dislocations. We demonstrate that constitutive equations for plasticity, describing different regimes of dislocation kinetics and calibrated with a minimum of adjustable constants, can be incorporated into finite element analysis and used reliably to predict the mechanical response of a nonuniform body. [S0094-4289(00)00302-9]

Issue Section:
Technical Papers
Keywords:
aluminium alloys, plastic deformation, yield stress, plastic flow, viscoplasticity, compressibility, finite element analysis, dislocation interactions, hardening
Topics:
Aluminum alloys, Compression, Deformation, Drag (Fluid dynamics), Finite element analysis, Hardening, Simulation, Stress, Temperature
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