About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
The Dislocation Configurational Energy for the Prediction of Fatigue Crack Nucleation: An Integrated Experimental and Computational Study |
Author(s) |
Nikoletta Prastiti, Fionn Dunne, Daniel Balint |
On-Site Speaker (Planned) |
Nikoletta Prastiti |
Abstract Scope |
A new quantity termed as the dislocation configurational energy density was recently introduced and described as the elastically-stored energy density associated with the interaction of dislocations and their structures. This quantity has shown excellent correlation with the stored energy quantity which has been used extensively, to correctly identify the experimentally observed sites of fatigue crack nucleation in a series of engineering alloys.
An integrated experimental, crystal plasticity and discrete dislocation plasticity study is presented to elucidate the mechanistic basis of fatigue crack nucleation in single crystal nickel-based superalloys. The role of geometrically necessary dislocations in fatigue crack nucleation at the micron scale is also discussed, along with other fatigue indicator parameters. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |