Study of internal lattice strain distributions in stainless steel using a full-field elasto-viscoplastic formulation based on fast Fourier transforms

A. K. Kanjarla, R. A. Lebensohn, L. Balogh, C. N. Tomé

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

In this work, the evolution of internal lattice strains in face-centered cubic stainless steel under uniaxial tension is studied using a recently developed full-field elasto-viscoplastic formulation based on fast Fourier transforms. The shape of the diffraction peaks is simulated, and the predicted lattice strains (peak shift and broadening) are compared with the experimental measurements obtained by in situ tensile neutron diffraction. Detailed analysis of the lattice strain distributions reveal that {1 0 0} and {1 1 0} transverse families exhibit a bimodal nature, and that transverse lattice strains are more sensitive to local grain interactions compared with longitudinal lattice strains. A comparison with the results of a mean-field formulation indicates that type III (intragranular) stresses play a much larger role than type II (intergranular) stresses in diffraction peak broadening.

Original languageEnglish
Pages (from-to)3094-3106
Number of pages13
JournalActa Materialia
Volume60
Issue number6-7
DOIs
Publication statusPublished - Apr 2012

Fingerprint

Stainless Steel
Fast Fourier transforms
Stainless steel
Diffraction
Neutron diffraction

Keywords

  • Lattice strains
  • Neutron diffraction
  • Peak broadening
  • Stainless steel
  • Yield phenomena

ASJC Scopus subject areas

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

Cite this

Study of internal lattice strain distributions in stainless steel using a full-field elasto-viscoplastic formulation based on fast Fourier transforms. / Kanjarla, A. K.; Lebensohn, R. A.; Balogh, L.; Tomé, C. N.

In: Acta Materialia, Vol. 60, No. 6-7, 04.2012, p. 3094-3106.

Research output: Contribution to journalArticle

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