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 …

Abstract Bulk nanostructured (ns)/ultrafine-grained (UFG) metallic materials possess very
high strength, making them attractive for high strength, lightweight and energy efficient …

According to Considère necking criterion, enhancing strength of a material will decrease its
elongation to failure, ie ductility, even if the strain hardening rate remains unchanged …

Metal matrix composites reinforced by nano-particles are very promising materials, suitable
for a large number of applications. These composites consist of a metal matrix filled with …

Pure tungsten and tungsten alloys with minor alloying additions are known to be brittle at
room temperature and have high ductile-to-brittle transition temperatures (DBTT). Improving …

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 …

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 …

Increasing the strength of metallic alloys while maintaining formability is an interesting
challenge for enabling new generations of lightweight structures and technologies. In this …

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

It is well known that plastic deformation induced by conventional forming methodssuch as
rolling, drawing or extrusion can significantly increase the strength of metalsHowever, this …