Imperial College London
Alternate

ProfessorFionnDunne

Faculty of Engineering, Department of Materials

Principal Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 2884fionn.dunne

 
 
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Location

 

104Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Dunne:2016:10.1016/j.ijplas.2016.10.001,
author = {Dunne, FPE and Guan, Y and Britton, TB and Jiang, J and Chen, B and Zou, J},
doi = {10.1016/j.ijplas.2016.10.001},
journal = {International Journal of Plasticity},
pages = {70--88},
title = {Crystal Plasticity Modelling and HR-DIC Measurement of Slip Activation and Strain Localisation in Single and Oligo-crystal Ni Alloys under Fatigue},
url = {http://dx.doi.org/10.1016/j.ijplas.2016.10.001},
volume = {88},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Single crystal (CMSX4) and oligocrystal (MAR002) nickel have been studied using three-point beambending under conditions of cyclic loading. SEM images have enabled identification of slip activation,and high resolution digital image correlation has been utilized to quantify the developing strain fieldsand the strain localization in both single and oligocrystals in fatigue. The single and oligocrystalmicrostructures have been replicated within crystal plasticity finite element models and the fatigueloading analysed such that grain-by-grain comparisons of slip may be carried out. Single and multipleslip activation, slip localisation and microstructure-sensitive stress evolution have been examined.Single crystal bend fatigue gives rise to non-symmetric slip fields and localisation depending oncrystallographic orientation. Modelling correctly captures slip activation and the developing nonsymmetricslip fields. Oligocrystal slip is markedly heterogeneous, with grain misorientations drivingstrong variations, also reasonably captured by the model. Microstructure behaviour is found to varyspatially and include elastic-plastic hysteresis which is stable, and which undergoes mean stressrelaxation so that plastic shakedown occurs. Remarkable variations occur between locations eitherside of grain boundaries, providing appropriate opportunities for fatigue crack nucleation.
AU  - Dunne,FPE
AU  - Guan,Y
AU  - Britton,TB
AU  - Jiang,J
AU  - Chen,B
AU  - Zou,J
DO  - 10.1016/j.ijplas.2016.10.001
EP  - 88
PY  - 2016///
SN  - 0749-6419
SP  - 70
TI  - Crystal Plasticity Modelling and HR-DIC Measurement of Slip Activation and Strain Localisation in Single and Oligo-crystal Ni Alloys under Fatigue
T2  - International Journal of Plasticity
UR  - http://dx.doi.org/10.1016/j.ijplas.2016.10.001
UR  - http://hdl.handle.net/10044/1/41121
VL  - 88
ER  -
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