About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Seeing is Believing -- Understanding Environmental Degradation and Mechanical Response Using Advanced Characterization Techniques: An SMD Symposium in Honor of Ian M. Robertson
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Presentation Title |
Slip Transfer at Grain Boundaries Investigated with 2-D and 3-D Experimental Measurements |
Author(s) |
Thomas R. Bieler, Harsha J Phukan, Chelsea M Edge, Zhuowen Zhao, Ruxin Xu, Martin A Crimp, Philip Eisenlohr, Carl J Boehlert |
On-Site Speaker (Planned) |
Thomas R. Bieler |
Abstract Scope |
Identification of slip processes at grain boundaries is complex and challenging for characterization and modeling. To enable modeling of heterogeneous deformation near grain boundaries, credible observations with good statistics are necessary, as the size of grain boundary misorientation space combined with slip system activation is huge. Recent work with 2-D characterization of slip transfer (direct or indirect transmission of dislocations through grain boundaries), has provided statistics, but TEM provides details at the atomistic scale that cannot be obtained otherwise. However, the extraction of a TEM foil removes the state of stress that drives the slip transfer process. To overcome this limitation, differential aperture x-ray microscopy enables micron-scale quantification of geometrically necessary dislocations (GNDs) present near grain boundaries with the concurrent local elastic stress state in an in-situ loaded sample. Insights gained from this analysis of GNDs and discernment of slip transfer will be discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Titanium, Characterization |