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 …

The Hall–Petch relation is discussed separately for the yield stress of undeformed
polycrystalline metals and for the flow stress of deformed metals. Key structural parameters …

A model is presented where the properties of ultrafine-grained (UFG) materials are
explained in terms of the influence of high-angle boundaries on the rates at which …

Four principal factors contribute to grain-boundary strengthening:(a) the grain boundaries
act as barriers to plastic flow;(b) the grain boundaries act as dislocation sources;(c) elastic …

The necessity to combine analyses of the intragranular plasticity with the effect of the locking
of dislocations close to the grain boundaries is emphasized and shown to describe …

Combining in an additive or synergetic manner the most potent strengthening mechanisms
available in an alloy is the art of the metallurgist. The various models proposed in the …

A simplified procedure for an order of magnitude experimental validation of a recently
proposed model for the strain-rate dependent deformation of nanostructured materials is …

Four principal factors contribute to grain-boundary strengthening:(a) the grain boundaries
act as barriers to plastic flow;(b) the grain boundaries act as dislocation sources;(c) elastic …

A phase mixture model was employed to simulate the deformation behavior of metallic
materials covering a wide grain size range from micrometer to nanometer scale. In this …