About this Abstract |
Meeting |
2024 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 |
Monitoring Defect Structure Evolution in Titanium Alloys Using High-Energy X-ray Diffraction |
Author(s) |
Kenneth Peterson, Jacob Ruff, Adam Pilchak, Lee Semiatin, Darren Pagan |
On-Site Speaker (Planned) |
Kenneth Peterson |
Abstract Scope |
Cold dwell fatigue in titanium alloys is understood to consist of deformation localization, stress redistribution, and then failure at adjacent hard and soft grain pairings. However, the interplay of deformation mechanisms, local loading conditions, and microstructural heterogeneity across length scales makes it difficult to precisely predict the when and where of failure nucleation. Fortunately, the recent development of wide-dynamic range X-ray detectors enables in situ observation of deformation in 3D sample volumes across multiple length scales to examine factors that contribute to cold dwell fatigue such as defect ordering and defect structure reconfiguration. In this study, high-dynamic range diffraction data collected from Ti-6Al-4V undergoing uniaxial tension, tension-only cyclic fatigue, and relaxation is analyzed using multiscale scattering and plasticity modeling to simultaneously characterize the evolution of defect structure ordering and intergranular interactions. |
Proceedings Inclusion? |
Planned: |
Keywords |
Titanium, Characterization, Mechanical Properties |