The τ-plot, a multicomponent 1-D pole figure plot, to quantify the heterogeneity of plastic deformation

T. H. Simm, Y. B. Das, A. N. Forsey, S. Gungor, M. E. Fitzpatrick, D. G.L. Prakash, R. J. Moat, S. Birosca, J. Quinta da Fonseca, K. M. Perkins

Research output: Contribution to journalArticle

Abstract

An approach is presented that allows multi-scale characterisations of heterogeneous deformation in crystalline materials by employing a range of characterisation techniques including: electron backscatter diffraction, digital image correlation and neutron diffraction powder measurements. The approach will be used to obtain critical information about the variations in parameters that characterise the deformed state in different crystallographic orientation texture components of a sample in a statistically significant way. These parameters include lattice strains, texture evolution, peak broadening, dislocation density, planar faults, phase changes and surface strain. This approach allows verification of models of plastic deformation to provide a more detailed view of plastic deformation heterogeneity at multiple length scales than obtained by other characterisation approaches. The approach demonstrated here is applied to two stainless steel alloys; an alloy that exhibits phase transformation during deformation and an alloy that remains the same phase all through deformation process.

Original languageEnglish
Article number110114
JournalMaterials Characterization
Volume160
Early online date3 Jan 2020
DOIs
Publication statusPublished - Feb 2020

Keywords

  • Diffraction peak profile analysis
  • Digital image correlation
  • Electron backscatter diffraction
  • Neutron diffraction
  • Planar faults
  • TRIP steel

ASJC Scopus subject areas

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

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