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 |
Study of Slip Transmissibility and Its Correlation to Local Geometrically Necessary Dislocation Content in Grade 1 Pure Titanium |
Author(s) |
Harsha Phukan, Thomas R Bieler, Ruqing Xu, Philip Eisenlohr, Martin A Crimp, Carl J Boehlert |
On-Site Speaker (Planned) |
Harsha Phukan |
Abstract Scope |
Using in-situ differential aperture x-ray microscopy analysis, a polycrystalline specimen of titanium with a soft texture favoring prism <a> slip was subjected to incremental four-point bending. The geometrically necessary dislocation (GND) content in several grain boundary regions was analyzed during hold times. Based on orientation gradients resulting from plastic deformation, total and slip system specific GND densities were calculated at the second bending increment (approximately 1.7% bulk strain). The propensity of slip transfer across a grain boundary is assessed using the Luster-Morris parameter and residual Burgers vector. In most cases, low transmissibility of slip can be directly correlated to pileups of GNDs of the slip systems with high resolved shear stress. Furthermore, the agglomeration of GNDs is significantly influenced by the local stress state, which differs significantly and varies spatially from the global stress state. Supported by DOE/BES grant DE-FG02-09ER46637; APS supported by DOE contract DE-AC02-06CH11357. |
Proceedings Inclusion? |
Planned: |