Diffraction measurements for evaluating plastic strain in A533B ferritic steel - a feasibility study

SJ Lewis, CE Truman

Research output: Contribution to journalArticle (Academic Journal)peer-review

9 Citations (Scopus)

Abstract

It is known that the physical properties of many engineering materials may be strongly affected by previous loading, in particular prior plastic deformation. Most obviously, work hardening will alter subsequent yielding behaviour. Plastic deformation may also preferentially align the material microstructure, resulting in anisotropy of subsequent behaviour and a change in material fracture resistance.

When physical characterization is undertaken by experimental testing it is, therefore, important to have some knowledge of the current state of the material. As a result, it is desirable to have methods of quantitatively evaluating the level of plastic deformation which specimen material may have experienced prior to testing.

This paper presents the results of a feasibility study, using a ferritic reactor pressure vessel steel, into the use of diffractive methods for plastic strain evaluation. Using neutron diffraction, changes in diffraction peak width and anisotropy of peak response were correlated with plastic deformation in a tensile test. The relationships produced were then used to evaluate permanent deformation levels in large samples, representative of standard fracture toughness test specimens.

Translated title of the contributionDiffraction measurements for evaluating plastic strain in A533B ferritic steel - a feasibility study
Original languageEnglish
Article number265501
Pages (from-to)265501
Number of pages11
JournalJournal of Physics D: Applied Physics
Volume43
Issue number26
DOIs
Publication statusPublished - 7 Jul 2010

Keywords

  • INTERGRANULAR BRITTLE-FRACTURE
  • LOW-ALLOY STEEL
  • NEUTRON-DIFFRACTION
  • RESIDUAL-STRESS
  • CLEAVAGE FRACTURE
  • DEFORMATION
  • REFINEMENT
  • CRITERION
  • BEHAVIOR
  • NICKEL

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