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{Bergsmo:2020:10.1016/j.ijfatigue.2020.105573,
author = {Bergsmo, A and Dunne, FPE},
doi = {10.1016/j.ijfatigue.2020.105573},
journal = {International Journal of Fatigue},
pages = {105573--105573},
title = {Competing mechanisms of particle fracture, decohesion and slip-driven fatigue crack nucleation in a PM nickel superalloy},
url = {http://dx.doi.org/10.1016/j.ijfatigue.2020.105573},
volume = {135},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Fatigue cracks may initiate around non-metallic inclusions via particle fracture, particle decohesion and slip-driven nucleation. Cohesive zone techniques within microstructurally faithful crystal plasticity modelling validated by micromechanical experiments (HR-DIC and HR-EBSD) are employed to investigate these nucleation phenomena. Particle fracture and decohesion lead to stress redistribution which influences subsequent energy storage driving slip-driven fatigue crack nucleation. Particle fracture and decohesion strengths were determined and using a stored energy criterion, the number of cycles to initiation of the fatigue microcrack was predicted. A threshold applied stress below which decohesion and fracture do not occur was obtained, thus modestly increasing fatigue life.
AU  - Bergsmo,A
AU  - Dunne,FPE
DO  - 10.1016/j.ijfatigue.2020.105573
EP  - 105573
PY  - 2020///
SN  - 0142-1123
SP  - 105573
TI  - Competing mechanisms of particle fracture, decohesion and slip-driven fatigue crack nucleation in a PM nickel superalloy
T2  - International Journal of Fatigue
UR  - http://dx.doi.org/10.1016/j.ijfatigue.2020.105573
UR  - http://hdl.handle.net/10044/1/78136
VL  - 135
ER  -
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