Creep features of nanostructured materials produced by severe plastic deformation

摘要

Using nanostructured copper, nickel and Cu-Al2O3 composite as an example, characteristic features of creep of nanostructured materials produced by severe plastic deformation was studied at temperatures T < 0.3 T-melt (T-melt is the melting point). The role of grain boundary state in the development of plastic deformation during creep of the above materials is analyzed. The differences in the creep activation energies in nanostructured and coarse-grained state is explained by the different contributions of grain boundary sliding to the overall deformation. [References: 22]