Quantification of dislocation structures from anelastic deformation behaviour

Arechabaleta Guenechea, Z.; van Liempt, P.; Sietsma, J.

doi:10.1016/j.actamat.2016.05.040

Quantification of dislocation structures from anelastic deformation behaviour

Title

Quantification of dislocation structures from anelastic deformation behaviour

Author

Arechabaleta Guenechea, Z. (TU Delft (OLD) MSE-1)
van Liempt, P. (Tata Steel)
Sietsma, J. (TU Delft (OLD) MSE-3)

Date

2016

Abstract

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.

Subject

Anelastic strain
Dislocation structure
Tensile test
X-ray diffraction

To reference this document use:

http://resolver.tudelft.nl/uuid:3aeb533e-6433-4794-bb24-c3ddfbddea4c

DOI

https://doi.org/10.1016/j.actamat.2016.05.040

ISSN

1359-6454

Source

Acta Materialia, 115, 314–323

Part of collection

Institutional Repository