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DOI

The pre-yield deformation behaviour (i.e., at stresses below the yield stress) of two materials, pure iron and a low-alloy steel, and its anelastic nature are analysed at room temperature, before and after the dislocation structures are varied by plastic deformation. It is shown, based on tensile experiments, that this behaviour can be explained by limited reversible glide of dislocations without essential changes in the dislocation structure. Moreover, a physically-based model that characterises the dislocation structure by two variables, the dislocation density and the effective dislocation segment length, is used to quantitatively describe this deformation behaviour. The model validity is further evaluated by comparison with dislocation densities from X-Ray Diffraction measurements.
Original languageEnglish
Pages (from-to)314–323
JournalActa Materialia
Volume115
DOIs
Publication statusPublished - 2016

    Research areas

  • Anelastic strain, Dislocation structure, Tensile test, X-ray diffraction

ID: 8990544