TY - JOUR
T1 - Unravelling dislocation networks in metals
AU - Arechabaleta Guenechea, Zaloa
AU - van Liempt, Peter
AU - Sietsma, Jilt
PY - 2018
Y1 - 2018
N2 - Understanding the intricate structure of dislocations in metals is a major issue in materials science. In this paper we present a comprehensive approach for the characterisation of dislocation networks, resulting in accurate quantification and significantly increasing the insight into the dislocation structure. Dislocation networks in metals consists of dislocation segments, pinned by microstructural obstacles. In the present paper a model is introduced that describes the behaviour of these dislocation segments in the pre-yield range of a tensile test on the basis of fundamental concepts of dislocation theory. The model enables experimental quantification of the dislocation density and segment length from the tensile curve. Quantitative results are shown and discussed on the development of the dislocation network as a function of increasing degree of plastic deformation, including validation and physical interpretation of the classical Taylor equation.
AB - Understanding the intricate structure of dislocations in metals is a major issue in materials science. In this paper we present a comprehensive approach for the characterisation of dislocation networks, resulting in accurate quantification and significantly increasing the insight into the dislocation structure. Dislocation networks in metals consists of dislocation segments, pinned by microstructural obstacles. In the present paper a model is introduced that describes the behaviour of these dislocation segments in the pre-yield range of a tensile test on the basis of fundamental concepts of dislocation theory. The model enables experimental quantification of the dislocation density and segment length from the tensile curve. Quantitative results are shown and discussed on the development of the dislocation network as a function of increasing degree of plastic deformation, including validation and physical interpretation of the classical Taylor equation.
KW - Anelastic strain
KW - Dislocation network
KW - Taylor equation
KW - Yield stress
UR - http://resolver.tudelft.nl/uuid:98704385-1ad9-469d-a512-643a16a51200
UR - http://www.scopus.com/inward/record.url?scp=85032785233&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2017.10.099
DO - 10.1016/j.msea.2017.10.099
M3 - Article
AN - SCOPUS:85032785233
SN - 0921-5093
VL - 710
SP - 329
EP - 333
JO - Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing
JF - Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing
ER -