| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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| Presentation Title |
Study of Grain-Scale Plastic Events Mechanisms in Ti-7Al Alloys With Far-Field High-Energy Diffraction Microscopy and Graph Theory |
| Author(s) |
Yuefeng Jin, Xiongye Xiao, Amlan Das, Wenxi Li, Peiyu Zhang, Katherine Shanks, Paul Bogdan, Ashley Bucsek |
| On-Site Speaker (Planned) |
Yuefeng Jin |
| Abstract Scope |
Although plasticity is traditionally modeled as a smooth process in space and time, in some hexagonal close-packed materials like α-phase structural titanium-aluminum alloys, plasticity can occur in localized, grain-scale bursts. These grain-scale plastic events can happen before macroscopic yield and are critical to room-temperature creep as well as dwell fatigue. In this work, we use far-field high-energy diffraction microscopy (ff-HEDM) to characterize the events happening in a Ti-7Al sample during creep loading and study the mechanisms of them with the help of graph theory. In graph analysis, every node represents a grain and edge connection represents the grain neighborhood. We explore the local features of regions with events happening and the global features of the whole sample, and study how these features change during loading. This helps us to understand when and where the grain-scale plastic events initiate and how they evolve inside the sample, leading to material failure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Titanium, |