Author/Authors :
Islamgaliev، نويسنده , , R.K and Buchgraber، نويسنده , , W and Kolobov، نويسنده , , Y.R and Amirkhanov، نويسنده , , N.M and Sergueeva، نويسنده , , A.V. and Ivanov، نويسنده , , K.V and Grabovetskaya، نويسنده , , G.P، نويسنده ,
Abstract :
High pressure torsion (HPT) was used in the present work to produce the metal matrix nanocomposite Cu+0.5 wt.% Al2O3. 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 conductivity are features of the nanocomposite samples. Decrease of creep rate by one order of magnitude and increase of time to failure by a factor of 4–5 is revealed in the nanocomposite compared with the extruded sample.
Keywords :
Electrical resistivity , Cu based composite , Severe plastic torsion straining , Nanostructure , Deformation behavior
