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- W2890460170 abstract "Grain refinement to the nano/ultrafine-grained regime can make metals several times stronger, but this process is usually accompanied by a dramatic loss of ductility. Such strength-ductility trade-off originates from a lack of strain-hardening capacity in tiny grains. Here, we present a strategy to regain the strain-hardening ability of high-strength metals by incorporation of extrinsic nanofillers at grain boundaries. We demonstrate that the dislocation storage ability in Cu grains can be considerably improved through this novel grain-boundary engineering approach, leading to a remarkably enhanced strain-hardening capacity and tensile ductility (uniform elongation). Experiments and large-scale atomistic simulations reveal that a key benefit of incorporated nanofillers is a reduction in the grain-boundary energy, enabling concurrent dislocation storage near the boundaries and in the Cu grain interior during straining. The strategy of grain-boundary engineering through nanofillers is easily controllable, generally applicable, and may open new avenues for producing nanostructured metals with extraordinary mechanical properties." @default.
- W2890460170 created "2018-09-27" @default.
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- W2890460170 date "2018-09-07" @default.
- W2890460170 modified "2023-10-16" @default.
- W2890460170 title "Regain Strain-Hardening in High-Strength Metals by Nanofiller Incorporation at Grain Boundaries" @default.
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- W2890460170 doi "https://doi.org/10.1021/acs.nanolett.8b02375" @default.
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