TY - JOUR
T1 - Quantification of dislocation structures from anelastic deformation behaviour
AU - Arechabaleta Guenechea, Zaloa
AU - van Liempt, Peter
AU - Sietsma, Jilt
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
KW - Anelastic strain
KW - Dislocation structure
KW - Tensile test
KW - X-ray diffraction
UR - http://resolver.tudelft.nl/uuid:3aeb533e-6433-4794-bb24-c3ddfbddea4c
U2 - 10.1016/j.actamat.2016.05.040
DO - 10.1016/j.actamat.2016.05.040
M3 - Article
SN - 1359-6454
VL - 115
SP - 314
EP - 323
JO - Acta Materialia
JF - Acta Materialia
ER -