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- W4281898360 abstract "Metals subjected to irradiation environments undergo microstructural evolution and concomitant degradation, yet the nanoscale mechanisms for such evolution remain elusive. Here, we combine in situ heavy ion irradiation, atomic resolution microscopy, and atomistic simulation to elucidate how radiation damage and interfacial defects interplay to control grain boundary (GB) motion. While classical notions of boundary evolution under irradiation rest on simple ideas of curvature-driven motion, the reality is far more complex. Focusing on an ion-irradiated Pt Σ3 GB, we show how this boundary evolves by the motion of 120° facet junctions separating nanoscale {112} facets. Our analysis considers the short- and mid-range ion interactions, which roughen the facets and induce local motion, and longer-range interactions associated with interfacial disconnections, which accommodate the intergranular misorientation. We suggest how climb of these disconnections could drive coordinated facet junction motion. These findings emphasize that both local and longer-range, collective interactions are important to understanding irradiation-induced interfacial evolution." @default.
- W4281898360 created "2022-06-13" @default.
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- W4281898360 date "2022-06-10" @default.
- W4281898360 modified "2023-10-15" @default.
- W4281898360 title "Irradiation-induced grain boundary facet motion: In situ observations and atomic-scale mechanisms" @default.
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- W4281898360 doi "https://doi.org/10.1126/sciadv.abn0900" @default.
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