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About this Abstract
Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Chemistry and Physics of Interfaces
Presentation Title Localized Engineering of Grain Boundary Morphology by Electro-Nano-Pulsing Processing
Author(s) Wenwu Xu, Runjian Jiang, Gio Conversano, Jakob Bravo-Calderon, Elisa Torresani, Eugene Olevsky
On-Site Speaker (Planned) Wenwu Xu
Abstract Scope We introduce an innovative electro-nano-pulsing (ENP) technique to locally engineer grain boundary (GB) morphologies in polycrystalline metallic materials. ENP generates intense nanopulse currents with densities exceeding 10^10 A/mē and durations around 100 ns, approximately 3-5 orders of magnitude greater than conventional Spark Plasma Sintering. Using Nichrome-80 superalloy as a model system, we observed diverse GB roughening phenomena at atomic and nanoscale levels, including facets, serrations, and step-like morphologies. These morphological changes are primarily attributed to highly localized heating and electron wind forces induced by ENP. This method provides a unique approach for precise grain boundary engineering without altering the adjacent grains.
Proceedings Inclusion? Planned:
Keywords Process Technology, Characterization, Other

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