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Limiting grain size through high-pressure torsion of different materials

Parvin, H ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1080/02670836.2019.1690822
  3. Publisher: Taylor and Francis Ltd , 2020
  4. Abstract:
  5. The main goal of high-pressure torsion (HPT) process is to reduce the grain size. Experiments have shown that this aim is achievable, but there is a limit in reducing the grain size. The present paper investigates this limit through a thermodynamics-based model. However, this was investigated by other researches through dislocation density-based model. At first, the validity of the model in description of the limiting grain size obtainable by HPT of different materials is examined. Then, the influence of inherent material parameters is investigated. Finally, the present results are compared with those obtained by equal channel angular pressing. © 2019, © 2019 Institute of Materials, Minerals and Mining
  6. Keywords:
  7. Grain refining ; High-pressure torsion ; Limiting grain size ; Modelling ; Thermodynamics ; Equal channel angular pressing ; Grain size and shape ; High pressure engineering ; Models ; Pressing (forming) ; Thermodynamics ; Dislocation densities ; Grain refining ; Grain size ; High pressure torsions ; Limiting grain sizes ; Material parameter ; Torsional stress
  8. Source: Materials Science and Technology (United Kingdom) ; Volume 36, Issue 2 , 2020 , Pages 245-250
  9. URL: https://www.tandfonline.com/doi/abs/10.1080/02670836.2019.1690822?journalCode=ymst20