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 …

We review some of the factors that influence the hardness of polycrystalline materials with
grain sizes less than 1 µm. The fundamental physical mechanisms that govern the hardness …

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 …

The influence of Zn on the strain hardening of as-extruded Mg-xZn (x= 1, 2, 3 and 4 wt%)
magnesium alloys was investigated using uniaxial tensile tests at 10− 3 s-1 at room …

Grain refinement is a very effective method to improve the mechanical properties of
materials and attracts widespread interests among researchers. However, the grain size …

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 …

Abstract Effects of strain rates on mechanical behaviors of nano-multilayered aluminum
5052 alloys are explored via molecular dynamics simulations. Yield strength and ultimate …

A broad variation of stacking fault energy (SFE) in high entropy alloys (HEAs) gives rise to
rich deformation mechanisms and unique mechanical properties of HEAs. In this paper, we …

The atomistic structural modification and ionic diffusivity in 8YSZ at elevated temperature
with the presence of an external electric field (E-field) were investigated by molecular …

Recent experimental studies indicate that the yield strength of nanocrystalline (NC) metals
under high hydrostatic pressure exhibits monotonous strengthening as the grain size …