About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
Quantitative Characterization and Multi-scale Modeling of the Effects of Porosity on Fatigue Life in Ni-based Single Crystal Superalloys |
Author(s) |
Keli Liu, Junsheng Wang |
On-Site Speaker (Planned) |
Keli Liu |
Abstract Scope |
Understanding the effects of porosity in Ni-based single crystal superalloys on fatigue damage is critical for predicting the lifetime of the aero-plane engine. In this research, the geometrical information of pores in as-cast and homogenized samples with different process conditions are obtained by X-ray tomography. Based on the reconstructed pore models as a function of casting conditions, simulations of the fatigue behavior is implemented as a subroutine in a fatigue life model which coupling of crystal plasticity and phase field fracture methods (the free and open source software DAMASK). Combining the experimental observation and numerical simulation results, the influences of the pore size, morphology and porosity connectivity on crack initiation and propagation behavior fatigue life can be quantitatively simulated. Therefore the fatigue damage mechanism of the pores is expected to be explained. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |