About this Abstract |
| Meeting |
2026 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 |
Using Elastic Criteria from a Crystal Plasticity Fast-Fourier Transform Model to Probe Fatigue Crack Initiation in Precipitation-Hardened IN-718
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| Author(s) |
Nicolas Fuchs-Lynch, Liad Habot, Shant Tepelekian, McLean Echlin, Tresa Pollock, Irene Beyerlein |
| On-Site Speaker (Planned) |
Liad Habot |
| Abstract Scope |
Previous prediction criteria for crack initiation in superalloys are studied using CP-FFT simulations on highly resolved EBSD data (TriBeam) of an IN-718 superalloy. Subsections of the 3D dataset are loaded in uniaxial tension via simulation. Elastic moduli mismatches, maximum Schmid factors, and twin boundary area of grains are determined and flagged regions with a high likelihood of slip band localization are compared to existing criteria for slip localization in this superalloy. A thorough statistical analysis of the grain morphology is also performed to evaluate correlations between morphology and the propensity for slip localization. Simulations with the full anisotropic stiffness tensor and the equivalent isotropic stiffness tensor are performed in order to evaluate the effect of anisotropy in these materials. These slip localization criteria are investigated in a statistical framework and placed in context of previous work on cyclic loading of René 88DT and other superalloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Mechanical Properties, Modeling and Simulation |