Discrete dislocation, crystal plasticity and experimental studies of fatigue crack nucleation in single-crystal nickel
File(s)
Accepted version
Author(s)
Prastiti, Nikoletta G
Xu, Yilun
Balint, Daniel S
Dunne, Fionn PE
Type
Journal Article
Abstract
Dislocation configurational energy and stored energy densities are determined in discrete dislocation and crystal plasticity modelling respectively and assessed with respect to experiments on single crystal nickel fatigue crack nucleation. Direct comparisons between the three techniques are provided for two crystal orientation fatigue tests. These provide confirmation that both quantities correctly identify the sites of fatigue crack nucleation and that stored energy density is a reasonable approximation to the more rigorous dislocation configurational energy. GND density is shown to be important in locating crack nucleation sites because of its role in the local configurational energy density.
Date Issued
2020-03
Date Acceptance
2019-10-09
Citation
International Journal of Plasticity, 2020, 126, pp.1-14
ISSN
0749-6419
Publisher
Elsevier BV
Start Page
1
End Page
14
Journal / Book Title
International Journal of Plasticity
Volume
126
Copyright Statement
© 2019 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
Royal Academy Of Engineering
Rolls-Royce Plc
Identifier
https://www.sciencedirect.com/science/article/pii/S0749641919306205?via%3Dihub
Grant Number
MMRE_P54661
1500-00268658
Subjects
Science & Technology
Technology
Engineering, Mechanical
Materials Science, Multidisciplinary
Mechanics
Engineering
Materials Science
Fatigue crack nucleation
Crystal plasticity
Dislocations
Stored energy
Configurational energy
Nickel superalloys
STORED ENERGY
INITIATION
MODEL
DEFORMATION
DYNAMICS
DENSITY
FORCE
Mechanical Engineering & Transports
0905 Civil Engineering
0912 Materials Engineering
0913 Mechanical Engineering
Publication Status
Published online
Article Number
102615
Date Publish Online
2019-11-11