Thermodynamic dislocation theory of high-temperature deformation in aluminum and steel
arXiv:1704.07577 · doi:10.1103/PhysRevE.96.013004
Abstract
The statistical-thermodynamic dislocation theory developed in previous papers is used here in an analysis of high-temperature deformation of aluminum and steel. Using physics-based parameters that we expect theoretically to be independent of strain rate and temperature, we are able to fit experimental stress-strain curves for three different strain rates and three different temperatures for each of these two materials. Our theoretical curves include yielding transitions at zero strain in agreement with experiment. We find that thermal softening effects are important even at the lowest temperatures and smallest strain rates.
7 pages, 8 figures
References in corpus (5)
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- Anomalous Fluctuations of Extremes in Many-Particle Diffusion
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- Statistical Thermodynamics of Dislocations in Solids
- Thermodynamic analysis of the Livermore molecular-dynamics simulations of dislocation-mediated plasticity
- Fracture Toughness of Crystalline Solids
- Plane constrained shear of single crystals
- Thermodynamic dislocation theory: Size effect in torsion
- Thermal softening during high-temperature torsional deformation of aluminum bars
- Thermodynamic dislocation theory for polycrystals under tension/compression
- Dislocation impediment by the grain boundaries in polycrystals