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Extreme grain refinement by severe plastic deformation: A wealth of challenging science

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Acta Materialia

Elsevier BV

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      Ultrahigh strength and high electrical conductivity in copper.

      Methods used to strengthen metals generally also cause a pronounced decrease in electrical conductivity, so that a tradeoff must be made between conductivity and mechanical strength. We synthesized pure copper samples with a high density of nanoscale growth twins. They showed a tensile strength about 10 times higher than that of conventional coarse-grained copper, while retaining an electrical conductivity comparable to that of pure copper. The ultrahigh strength originates from the effective blockage of dislocation motion by numerous coherent twin boundaries that possess an extremely low electrical resistivity, which is not the case for other types of grain boundaries.
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        Bulk nanostructured materials from severe plastic deformation

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          Mechanical properties of nanocrystalline materials

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            Author and article information

            Journal
            Acta Materialia
            Acta Materialia
            Elsevier BV
            13596454
            February 2013
            February 2013
            : 61
            : 3
            : 782-817
            10.1016/j.actamat.2012.10.038
            © 2013

            http://www.elsevier.com/tdm/userlicense/1.0/

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