Dynamic strain aging: A coupled dislocation-Solute dynamic model

C. Fressengeas, A. J. Beaudoin, M. Lebyodkin, L. P. Kubin, Y. Estrin

Research output: Contribution to journalArticlepeer-review

Abstract

A model for dynamic strain aging is proposed. It is written as a local constitutive formulation but can easily be extended to account for spatial interactions. The model is obtained by embedding accepted 'slow' time scale formulations for dislocation dynamics and aging kinetics in a multiple time scales dynamic system. Dislocation and solute dynamics are coupled at the 'fast' time scale pertaining to dynamic aging. Features of jerky flow described by standard models such as the negative strain rate sensitivity of the flow stress and critical strains for the occurrence of the Portevin-Le Chatelier effect are retrieved. In addition, negative strain rate sensitivity of the threshold stress for instability is predicted.

Original languageEnglish (US)
Pages (from-to)226-230
Number of pages5
JournalMaterials Science and Engineering A
Volume400-401
Issue number1-2 SUPPL.
DOIs
StatePublished - Jul 25 2005

Keywords

  • Dynamic strain aging
  • Portevin-Le Chatelier (PLC)
  • Solute dynamic model

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Dynamic strain aging: A coupled dislocation-Solute dynamic model'. Together they form a unique fingerprint.

Cite this