About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Crystal Plasticity-based Modelling of Taylor Impact Test of Single Crystal Tantalum |
Author(s) |
Zhangxi Feng, Miroslav Zecevic, Ricardo A. Lebensohn, Marko Knezevic |
On-Site Speaker (Planned) |
Zhangxi Feng |
Abstract Scope |
Tests carried out for Ta single crystal cylinders impacted along different crystallographic directions showed strong variations in dimensional changes for different orientations [1]. In order to capture the strong effect of crystallography on the deformation mechanisms and final shapes of the impacted cylinders, a polycrystal plasticity material model based on the viscoplastic self-consistent (VPSC) formulation was adapted to single-crystal material points and embedded in solid mechanics/dynamics solvers to simulate the aforementioned single-crystal Ta Taylor anvil experiments. Details of the coupled model implementation and insights on the role of single-crystal anisotropic flow on the deformation behavior under extreme mechanical and adiabatic heating conditions across a broad range of strain-rate and temperatures will be presented and discussed. [1] H. Lim et al: “Anisotropy and strain localization in dynamic impact experiments of tantalum single crystals”. Scientific Reports 8, 5540 (2018). |
Proceedings Inclusion? |
Planned: |