About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Response of Materials Investigated Through Novel In-Situ Experiments and Modeling
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Presentation Title |
Investigation of Dislocation-grain Boundary Interactions through In-situ Micro-mechanical Testing with Strain Mapping |
Author(s) |
Dongyue Xie, Sumit Suresh, Jade Peng, Jonathan Gigax, Nithin Mathew, Darby Luscher, Abigail Hunter, Saryu Fensin, Nan Li |
On-Site Speaker (Planned) |
Dongyue Xie |
Abstract Scope |
In polycrystalline metals and alloys, grain boundaries (GBs) are the largest impediment to the dislocation motion and can dramatically change the mechanical properties of material. Therefore, understanding the process of the interactions between dislocations and GBs will be helpful for predicting the properties of material. Different phenomenon can occur during this process. For example, a dislocation can transmit across a GB, be partially absorbed at the GB, or glide along the GB and re-emit, altering the GB structure. To investigate the detailed information about deformation process, we used in-situ micro-pillar compression testing with simultaneous high angular resolution electron backscatter diffraction characterization. The strain maps and correlated lattice rotation of different moments during the tests were calculated. The influence of grain boundary structure on the mechanical property and interaction behavior with dislocations were explored. In addition, such information has provided a unique validation for the modeling at both atomic and mesoscales. |
Proceedings Inclusion? |
Planned: |