Feasibility study of neutron strain tomography

Brian Abbey, Shu Yan Zhang, Wim J.J. Vorster, Alexander M. Korsunsky

Research output: Contribution to journalConference articlepeer-review

34 Citations (Scopus)

Abstract

Extraction of information about residual elastic strain within the bulk is of primary importance in understanding deformation and stress within engineering components. Current techniques for mapping residual strain often require (semi)destructive sample preparation and only provide strain information at discrete points within the sample. The solution proposed here, based on the Bragg edge neutron transmission method, is non-destructive, and in principle allows a three-dimensional reconstruction of the residual strain throughout the bulk of the sample. The fundamental principle underlying the method is the inversion of a two- dimensional data set in order to obtain three-dimensional information, analogous to the familiar tomographic methods used to reconstruct three-dimensional density distributions in conventional imaging. In the present study we reconstruct the strain profiles from a stainless steel water-spray quenched cylinder. The radially symmetric strain distributions present in the sample help to simplify the analysis, however the method could readily be extended to the reconstruction of arbitrarily complex strain distributions.

Original languageEnglish
Pages (from-to)185-188
Number of pages4
JournalProcedia Engineering
Volume1
Issue number1
DOIs
Publication statusPublished - 2009
Externally publishedYes
EventMesomechanics 2009 - Oxford, United Kingdom
Duration: 24 Jun 200926 Jun 2009

Keywords

  • Neutron diffraction
  • Neutron transmission
  • Strain Tomography

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