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 …

The mechanical properties of nanocrystalline materials are reviewed, with emphasis on their
constitutive response and on the fundamental physical mechanisms. In a brief introduction …

Focusing on nanocrystalline (nc) pure face-centered cubic metals, where systematic
experimental data are available, this paper presents a brief overview of the recent progress …

Two of the key parameters that are useful for understanding the deformation kinetics in
metals with ultrafine grain (UFG) and/or nanocrystalline (nc) microstructure are the strain …

In recent years, near-nano (submicron) and nanostructured materials have attracted
increasingly more attention from the materials community. Nanocrystalline materials are …

An inverse Hall–Petch effect has been observed for nanocrystalline materials by a large
number of researchers. This effect implies that nanocrystalline materials get softer as grain …

This paper describes mechanistic models that seek to rationalize experimentally determined
low values for the activation volume associated with the high strain rate sensitivity of …

We have investigated the rate sensitivity of flow stress and the extent of strengthening in
polycrystalline copper containing different volume fractions of nano-sized twins, but having …

Nanocrystalline metals, ie, metals in which the grain size is in the nanometer range, have a
range of technologically interesting properties including increased hardness and yield …

The measured hardness of nanocrystalline Cu with grain sizes (d) as small as 10nm still
follows the Hall–Petch relation. A rate sensitivity of 0.06±0.01 and a flow stress activation …