About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Critical Resolved Shear Stresses (CRSS) of Hexagonal Titanium from Nanoindentation Optimization |
Author(s) |
Zhuowen Zhao, Mario Rueda Ruiz, Jiawei Lu, Miguel Monclus, Jon Molina-Aldareguia, Thomas R. Bieler, Philip Eisenlohr |
On-Site Speaker (Planned) |
Zhuowen Zhao |
Abstract Scope |
CRSS values of slip systems in hexagonal titanium form the basis of the description of its crystal plasticity. Experimental quantification of individual CRSS value by exclusive activation (conditions of single slip) is very difficult. An inverse methodology to establish CRSS values is through fitting simulated results to experimental counterparts. However, disagreement among CRSS ratios for pure titanium by fitting against different experimental observations at room temperature has been reported. It is also known that temperature and composition could alter the CRSS values or their relative order. This study aims at identifying parameter sets at ambient and higher temperatures for pure titanium, Ti-3Al-2.5V, and Ti-6Al-4V using an efficient approach that is based on surface topography and load-displacement curve from nanoindentation. Quantitative assessment of possible sources that contribute to the deviation between simulated (using optimized parameters) and measured response from nanoindentation is carried out, such that sensitivity of the approach is established. |
Proceedings Inclusion? |
Planned: |
Keywords |
Titanium, Modeling and Simulation, |