Role of interfaces on phase formation during severe plastic deformation

Nirab Pant, Sourav Das, P. Bellon, R. S. Averback*, Menahem Krief, Y. Ashkenazy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The role of interfaces on phase formation during severe plastic deformation (SPD) was investigated using molecular dynamics simulations. It is found that dilute solute additions that segregate to interphase boundaries, and strengthen them, can greatly extend the solubility limits of the bounding phases at steady state, providing a novel approach to processing nanocomposite alloys by SPD. The results are rationalized in terms of a modified effective temperature model, whereby increasing the interface strength leads to higher effective temperatures and correspondingly to higher solubilities. Comparison of the segregation coefficient at the interphase boundary with solubilities in the bounding phases illustrates the effective temperature model is self-consistent and comprehensive. Past experimental studies on severe plastic deformation are found consistent with these observations.

Original languageAmerican English
Article number118333
JournalActa Materialia
Volume240
DOIs
StatePublished - Nov 2022

Bibliographical note

Publisher Copyright:
© 2022 Acta Materialia Inc.

Keywords

  • Effective temperature model
  • Molecular dynamics simulations
  • Non-equilibrium processing
  • Phase stability
  • Severe plastic deformation (SPD)

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