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 …

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

Abstract The aluminum-zirconium (Al-Zr) alloys are of interest because of their superior
thermal stability and good electrical conuctivity, but their main drawback is their rather low …

The effect of the grain size on the mechanical properties of metallic materials has been a
topic of significant interest for researchers and industry. For many decades, a relationship …

To have an insight into the occurrence of inverse Hall-Petch relationship in ultrafine-grained
(UFG) aluminum alloys produced by severe plastic deformation (SPD), ultra-SPD (ie …

Strengthening by grain refinement via the Hall–Petch mechanism and softening by
nanograin formation via the inverse Hall–Petch mechanism have been the subject of …

A physically based model to predict the increment of hardness and grain refinement of pure
metals due to severe plastic deformation by high-pressure torsion (HPT) is proposed. The …

High purity copper was processed by high-pressure torsion (HPT) at room temperature and
then stored at room temperature for periods of up to 6 weeks to investigate the effect of self …

Twist extrusion (TE) is one of the most popular techniques of severe plastic deformation,
aiming at imparting to a material a tailored microstructure and the associated property …

In this overview, the applicability of X-ray diffraction line profile analysis (XLPA) for the
characterization of the microstructure in nanostructured materials is overviewed. The …