About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Materials for High Temperature Applications: Next Generation Superalloys and Beyond
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Presentation Title |
New Tools for Analysis of Microplasticity in BCC Refractory Metals |
Author(s) |
Leah H. Mills, Jean-Charles Stinville, Marie-Agathe Charpagne, Joseph Wendorf, McLean P. Echlin, Valéry Valle, Paul R. Dawson, Daniel S. Gianola, Tresa M. Pollock |
On-Site Speaker (Planned) |
Leah H. Mills |
Abstract Scope |
Predicting the deformation behavior of BCC refractory metals used in structural applications, such as Multi-Principal Element alloys, motivates the fundamental exploration of slip systems at the scale of individual grains over large areas. High resolution digital image correlation (HR-DIC) in the scanning electron microscope has been employed for identification of active slip systems during monotonic loading of pure niobium. Higher-order slip planes are identified in addition to the conventional {110} and {112} planes, as are the unique slip systems. This in-situ technique is paired with Mechanical Metrics (MechMet), a finite element elasticity code, which was enhanced with material-specific elastic properties and the identified higher order slip strengths. The impact of slip on the high-order planes for various instantiated virtual samples is discussed. The onset of microplasticity prior to macroscopic yielding is analyzed with consideration of the strength-to-stiffness metric. The importance of local polycrystalline "neighborhoods" will also be addressed. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Characterization, Modeling and Simulation |