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High pressure torsion (HPT) was used in the present work to produce the metal matrix nanocomposite Cu+0.5 wt.% Al 2 O 3 . The mean grain size and root-mean-squared strain were studied by transmission electron microscopy (TEM) and X-ray diffraction (XRD). It is shown that high ultimate strength (680 MPa) and microhardness (2300 MPa), as well as high thermal stability and electrical...
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