| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Verification, Calibration, and Validation Approaches in Modeling the Mechanical Performance of Metallic Materials
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| Presentation Title |
Improved Representation of Grain-Level Microstructures to Support Advanced In-Situ Mechanical Testing |
| Author(s) |
Michael D. Uchic, Gregory E. Sparks, Michael Chapman, Paul A. Shade, Mark Obstalecki |
| On-Site Speaker (Planned) |
Michael D. Uchic |
| Abstract Scope |
This presentation will discuss destructive correlative characterization and analysis research to improve the 3D representation of complex microstructures from mechanical test samples, specifically highlighting efforts to advance High-Energy Diffraction Microscopy (HEDM) in-situ experiments. HEDM, when combined with in-situ mechanical testing, provides a rich source of experimental data for nondestructively measuring the evolving local strain state within individual grains under quasi-static and fatigue loading, which is essential for advancing plasticity models that predict the local response of grains within a polycrystalline ensemble. HEDM measurements can successfully instantiate portions of the grain ensemble—e.g., larger grains (> 20 ìm) that have a uniform crystallographic orientation—but at the present time struggles to reconstruct other features, particularly smaller grains, grains that contain many annealing twins, or grains with significant orientation gradients. The study will present destructive serial sectioning and multi-modal surface-based microscopy (optical, scanning electron, EBSD, white light interferometry) that provide more accurate reconstructions of the test gage volumes, and discuss opportunities to improve both the destructive and nondestructive mapping of microstructure. |
| Proceedings Inclusion? |
Planned: |