Annealing out dislocations in deformed metals usually leads to reduced strength and increased ductility. Exactly the opposite has been observed in bulk nanostructured aluminium.
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Ma, E., Shen, T. & Wu, X. Less is more. Nature Mater 5, 515–516 (2006). https://doi.org/10.1038/nmat1671
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DOI: https://doi.org/10.1038/nmat1671
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