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Mechanistic modelling of cryo-deformation and post-annealing of aluminium

Alyani, A ; Sharif University of Technology | 2023

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  1. Type of Document: Article
  2. DOI: 10.1080/02670836.2022.2123122
  3. Publisher: Taylor and Francis Ltd , 2023
  4. Abstract:
  5. Dynamic recovery (DRV) occurs through severe plastic deformation (SPD) of high-stacking fault energy metals, even at room temperature. SPD at sub-zero or relatively low temperatures, namely cryo-deformation, has long been employed to confer enhanced mechanical properties due to the suppression of DRV. In this paper, mechanistic models with a metallurgical sense are investigated for low- and room-temperature SPD (200 and 300 K) and post-annealing of aluminium. Cellular substructure as well as cross-slip and climb effects are considered in the modelling of SPD. A model based on stored energy is also used for the contribution of dislocation density to post-annealing behaviour. The predicted flow stress curve is fitted the experimental results perfectly. The mechanistic modelling of SPD has demonstrated a multi-stage work-hardening behaviour, which entails more details such as the mutual effects of DRV and dynamic recrystallisation. The annealing experimental results are in line with the post-annealing model outputs. © 2022 Institute of Materials, Minerals and Mining
  6. Keywords:
  7. Aluminium ; Cryo-deformation ; Dislocation density ; Dynamic recovery ; ETMB ; Mechanistic modelling ; Post-annealing ; Severe plastic deformation
  8. Source: Materials Science and Technology (United Kingdom) ; Volume 39, Issue 4 , 2023 , Pages 485-495 ; 02670836 (ISSN)
  9. URL: https://www.tandfonline.com/doi/abs/10.1080/02670836.2022.2123122