A phenomenological model of twinning-mediated strain hardening

Alexei Vinogradov, Einar Agletdinov, Igor S. Yasnikov, Kristián Máthis, Yuri Estrin

Research output: Contribution to journalArticleResearchpeer-review

Abstract

We present a model of strain-hardening in materials with twinning-mediated plasticity. While the model is largely phenomenological, it was motivated by microstructural considerations and can be claimed to be physically sound. Using simple, yet sensible, assumptions regarding the stress-driven twinning kinetics and dislocation-twin interactions, constitutive equations governing the strain hardening behaviour were obtained and solved numerically. The solutions were compared with the experimental data on uniaxial deformation of pure magnesium and Mg alloy ZK60, and this comparison substantiated the validity and practicality of the model proposed.

Original languageEnglish
Article number139194
Number of pages12
JournalMaterials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume780
DOIs
Publication statusPublished - 7 Apr 2020

Keywords

  • Dislocation-twin interaction
  • Magnesium
  • Phenomenological modelling
  • Strain hardening
  • Twinning

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