Role of interfaces on phase formation during severe plastic deformation

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

Research output: Contribution to journalArticlepeer-review


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 languageEnglish (US)
Article number118333
JournalActa Materialia
StatePublished - Nov 2022
Externally publishedYes


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

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys


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