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Dependency modeling of steady state grain size on the stacking fault energy through severe plastic deformation

Parvin, H ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matlet.2015.07.041
  3. Publisher: Elsevier , 2015
  4. Abstract:
  5. Recent investigations have shown that the steady state grain size of severely deformed materials is dependent on the stacking fault energy. In this paper, a model is presented to investigate such a dependency which uses thermodynamics based calculations. The present model shows that the relationship between the steady state grain size and the stacking fault energy of material is in power law form, directly. Furthermore, the model shows that the steady state grain size has an exponential relationship with the self-diffusion activation energy and a decrease in the self-diffusion activation energy increases the steady state grain size. The model predictions are in good agreement with the experimental data
  6. Keywords:
  7. Deformation and fracture ; Severe plastic deformation ; Simulation and modeling ; Stacking fault energy ; Steady state grain size ; Chemical activation ; Grain size and shape ; Plastic deformation ; Thermodynamics ; Deformation and fracture ; Grain size ; Severe plastic deformations ; Simulation and modeling ; Stacking fault energies ; Activation energy
  8. Source: Materials Letters ; Volume 159 , November , 2015 , Pages 410-412 ; 0167577X (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0167577X15302330