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 |
Marked 2-point Spatial Correlations of Microstructure Neighborhoods Surrounding Fatigue Hot-spots in Ti-6Al-4V |
Author(s) |
Adrienne Muth, Surya Kalidindi, Reji John, Adam Pilchak, David McDowell |
On-Site Speaker (Planned) |
Adrienne Muth |
Abstract Scope |
Formation of fatigue cracks at the subgrain scale is statistically rare, especially when plastic deformation is highly heterogeneous. Fatigue Indicator Parameters (FIPs) for Ti64 are computed using crystal plasticity simulations for ensembles of statistical volume elements. The maximum extreme value (EV) FIP locations are identified, and 2-point spatial correlations are applied at two different characteristic length scales to investigate the coupled effects of microstructure attributes in the neighborhood of these fatigue hot-spots. ‘Fine’ scale 2-point statistics includes the volume immediately surrounding a subgrain averaged EV FIP. ‘Coarse’ scale convolutes two masked volumes, one containing the volume elements within an EV FIP location, the second of a selected radius surrounding an EV FIP grain, ensuring either the head or tail of every 2-point vector occurs in an EV FIP grain, termed marked 2-point correlations. To reduce dimensionality of the associated 2-point correlations, principal component analysis is subsequently applied. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |