About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Local Ordering in Materials and Its Impacts on Mechanical Behaviors, Radiation Damage, and Corrosion
|
Presentation Title |
Coupled Grain Boundary and Twin Boundary Deformation in Metallic Materials |
Author(s) |
Jiangwei Wang, Qi Zhu, Haofei Zhou, Xianghai An |
On-Site Speaker (Planned) |
Jiangwei Wang |
Abstract Scope |
Polycrystalline and nanocrystalline metallic materials often show interface-dominated plasticity, where the coupling between neighboring interfaces plays important role, especially during the dynamic process of deformation. This talk presents the recent progresses of coupled grain boundary (GB) and twin boundary (TB) deformation in metallic materials. GB-emitted nanotwin was found effectively to tune the deformability of its source GB, favoring the GB-dominated process; while, the large kinks on defective TBs can be regarded as small GB segment, which can facilitate the formation of secondary nanotwins. Such self-activated twin multiplication process acts as a built-in source for hierarchical twin, which develops gradually and induces the formation of five-fold nanotwin and nanotwin network eventually. The coupled GB-TB deformation critically controls the dynamic microstructural evolution during the deformation of metallic materials with low stacking fault energy, as demonstrated by the complicated GB-TB networks in a variety of deformed nanocrystalline materials. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Mechanical Properties, High-Entropy Alloys |