About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Local Ordering in Materials and Its Impacts on Mechanical Behaviors, Radiation Damage, and Corrosion
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Presentation Title |
Tunable Short-range Order Within Amorphous Complexions and Its Connection to Damage Nucleation |
Author(s) |
Pulkit Garg, Esther Hessong, Tianjiao Lei, Timothy J. Rupert |
On-Site Speaker (Planned) |
Timothy J. Rupert |
Abstract Scope |
Grain boundaries are common sites for damage nucleation during plastic formation, especially in nanocrystalline metals. In this talk, we explore how structural short-range order determines damage tolerance in disordered complexions. The incompatibility between grains is first shown to determine the level of order/disorder at the amorphous-crystalline interface, with the grain-film-grain system finding a local equilibrium configuration. The amorphous-crystalline interface is critical to damage tolerance because it is the location where incoming dislocations must be accommodated, with subsequent atomistic modeling showing that damage nucleation and short-range order are intimately related in this region. These theoretical insights are then leveraged to produce nanocrystalline alloys with complex interfacial chemistries and tunable structural short-range order, opening pathways for design of tough nanostructured metals. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Phase Transformations, Thin Films and Interfaces |