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Predicting grain refinement by cold severe plastic deformation in alloys using volume average dislocation generation

By M.J. Starink, X.G. Qiao, J. Zhang and N. Gao

Abstract

The grain refinement during severe plastic deformation (SPD) is predicted using volume averaged amount of dislocations generated. The model incorporates a new expansion of a model for hardening in the parabolic hardening regime, in which the work hardening depends on the effective dislocation free path related to the presence of non shearable particles and solute-solute nearest neighbour interactions. These two mechanisms give rise to dislocation multiplication in the form of generation of geometrically necessary dislocations and dislocations induced by local bond energies. The model predicts the volume averaged amount of dislocations generated and considers that they distribute to create cell walls and move to existing cell walls/grain boundaries where they increase in the grain boundary misorientation. The model predicts grain sizes of Al alloys subjected to SPD over 2 orders of magnitude. The model correctly predicts the considerable influence of Mg content and content of non-shearable particles on the grain refinement during SPD

Topics: TN
Year: 2009
OAI identifier: oai:eprints.soton.ac.uk:66237
Provided by: e-Prints Soton

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Citations

  1. (1997). Acta Mater
  2. (2002). Acta Mater.
  3. Alexandrov IV.
  4. Database of grain sizes of HPT processed Al alloys, www.eprints.soton.ac.uk/66237/
  5. (2007). Editors, Proc of the intern. symp. on fundamentals of deformation and annealing, TransTech,
  6. (2008). Mater Sci Eng A
  7. Mater Sci Eng A,
  8. (1994). MSc thesis,
  9. (2000). Practical Guide to Image Analysis,
  10. (1970). Quantitative Stereology, Addison-Wesley,
  11. (1999). Research Reports of the Faculty of Engineering,
  12. (1971). RK, in “Strengthening Methods
  13. Russian Metallurgy (Metally)
  14. (2008). Sci Eng A
  15. (2004). Scripta Mater
  16. Studies in large plastic flow and fracture,.

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