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Open Access Publications from the University of California

Thermodynamic dislocation theory of high-temperature deformation in aluminum and steel.

  • Author(s): Le, KC
  • Tran, TM
  • Langer, JS
  • et al.

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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.

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