STRENGTH AND DUCTILITY OF METALS

A dislocation mechanics based description is given for the low tempera ture yield stress, strain hardening and ductile fracturing characteris tics of bcc, fcc and hcp materials. The Hall-Fetch dislocation pile-up model for separating events within grain volumes and it their boundar ies is usefully applied to deciphering single crystal/polycrystal conn ections, alloy strengthening effects, temperature/strain rate influenc es, and fracturing behaviors, particularly relating to particle and gr ain size dependencies of material ductility.