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{Jiang:2017:10.1007/s11837-017-2307-9,
author = {Jiang, J and Dunne, F and Britton, T},
doi = {10.1007/s11837-017-2307-9},
journal = {JOM},
pages = {863--871},
title = {Toward predictive understanding of fatigue crack nucleation in Ni-based Superalloys},
url = {http://dx.doi.org/10.1007/s11837-017-2307-9},
volume = {69},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Predicting when and where materials fail is a holy grail for structural materials engineering. Development of a predictive capability in this domain will optimize the employment of existing materials, as well as rapidly enhance the uptake of new materials, especially in high-risk, high-value applications, such as aeroengines. In this article, we review and outline recent efforts within our research groups that focus on utilizing full-field measurement and calculation of micromechanical deformation in Ni-based superalloys. In paticular, we employ high spatial resolution digital image correlation (HR-DIC) to measure surface strains and a high-angular resolution electron backscatter diffraction technique (HR-EBSD) to measure elastic distortion, and we combine these with crystal plasticity finite element (CPFE) modeling. We target our studies within a system of samples that includes single, oligo, and polycrystals where the boundary conditions, microstructure, and loading configuration are precisely controlled. Coupling of experiment and simulation in this manner enables enhanced understanding of crystal plasticity, as demonstrated with case studies in deformation compatibility; spatial distributions of slip evolution; deformation patterning around microstructural defects; and ultimately development of predictive capability that probes the location of microstructurally sensitive fatigue cracks. We believe that these studies present a careful calibration and validation of our experimental and simulation-based approaches and pave the way toward new understanding of crack formation in engineering alloys.
AU  - Jiang,J
AU  - Dunne,F
AU  - Britton,T
DO  - 10.1007/s11837-017-2307-9
EP  - 871
PY  - 2017///
SN  - 1047-4838
SP  - 863
TI  - Toward predictive understanding of fatigue crack nucleation in Ni-based Superalloys
T2  - JOM
UR  - http://dx.doi.org/10.1007/s11837-017-2307-9
UR  - http://hdl.handle.net/10044/1/45019
VL  - 69
ER  -
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