About this Abstract |
Meeting |
2023 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 |
M-19: Creep and Dwell Fatigue Studies of Ti-7Al with High-Energy Diffraction Microscopy and Acoustic Emission Measurements |
Author(s) |
Yuefeng Jin, Amlan Das, Wenxi Li, Katherine Shanks, Ashley Bucsek |
On-Site Speaker (Planned) |
Yuefeng Jin |
Abstract Scope |
Though plasticity is traditionally modeled as a smooth process in space and time, in past two decades, studies has shown that it can also occur in localized bursts known as intermittent plasticity. Such bursts can happen not only after but also before the macroscopic yield. In this work, two Ti-7Al samples were loaded under creep and dwell fatigue conditions, respectively, and grain-scale stresses and plastic deformation activity were tracked using combined far-field high-energy diffraction microscopy (ff-HEDM) and acoustic emissions (AE) measurements. The results reveal the initiation, evolution, and effects of intermittent plasticity and how intermittent plastic events can be observed in ff-HEDM and AE data sets. This experiment shows how ff-HEDM and AE can be integrated to spatially and temporally resolve local plasticity events to design creep- and fatigue-resistant alloys for the future. |
Proceedings Inclusion? |
Planned: |