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- W4387613625 abstract "Linear complexions are stable defect states, where the stress field associated with a dislocation induces a local phase transformation that remains restricted to nanoscale dimensions. As these complexions are born at the defects which control plasticity in metals, it is crucial to understand their impact on subsequent mechanical properties. In this work, atomistic modeling is used to understand how dislocation mechanics are altered by the presence of nanoparticle array linear complexions in a Ni-Al alloy. Molecular dynamics simulations are used to identify the critical shear stress needed to drive dislocation breakaway, first for nanoparticle arrays formed by Monte Carlo/molecular dynamics methods to represent realistic configurations and subsequently for simplified models that allow the effects of particle spacing and size to be varied in a controlled manner. A combined bowing and progressive unpinning mechanism is uncovered, leading to the demonstration of a new strength scaling law that differs in keys ways from classical Orowan bowing." @default.
- W4387613625 created "2023-10-14" @default.
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- W4387613625 date "2023-10-01" @default.
- W4387613625 modified "2023-10-15" @default.
- W4387613625 title "Dislocation breakaway from nanoparticle array linear complexions: Plasticity mechanisms and strength scaling laws" @default.
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- W4387613625 doi "https://doi.org/10.1016/j.mtla.2023.101929" @default.
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