The grain size, and therefore the grain boundary density, is known to play a major role in the
flow stress of metallic materials. A linear relationship to the inverse of the square root of the …

In recent years, much progress has been made in the studies of nanostructured Al alloys for
advanced structural and functional use associated both with the development of novel …

A strength-ductility trade-off usually occurs when grains are refined to increase strength. A
question arises on if there exists a grain size for the best strength-ductility combination, ie …

In recent years, bulk nanostructured materials (NSM) processed by methods of severe
plastic deformation (SPD) have attracted the growing interest of specialists in materials …

During the last decade, equal-channel angular pressing (ECAP) has emerged as a widely-
known procedure for the fabrication of ultrafine-grained metals and alloys. This review …

Ultrafine-grained materials display almost no strain hardening, an enhanced strain rate
sensitivity and grain boundary offsets during plastic deformation. It is expected that …

The x-ray line profiles of an ultrafine grained copper crystal, produced by equal-channel
angular pressing, were measured by a special high resolution diffractometer with negligible …

Despite rosy prospects, the use of nanostructured metals and alloys as advanced structural
and functional materials has remained controversial until recently. Only in recent years has a …

Results Fig. 2 shows the change in mechanical properties of the ARBed aluminum. The
tensile strength increased with increasing number of cycles or strain. Surprisingly it reached …

It has been shown recently that in many cases strain anisotropy in powder diffraction can be
well accounted for by the dislocation model of the mean square strain. The practical …