Elongated dislocation loops and the stress-strain properties of copper single crystals

Recent Progress in Discrete Dislocation Dynamics and Its Applications to Micro Plasticity

“…This choice is motivated by the large body of evidence that prismatic loops exist in fcc metals and other crystals structures from very early stages of plastic deformation. 83,84,[106][107][108] Compared to FR sources, the distinctive feature of prismatic loops is that they can be glissile on all four sides and, therefore, they may provide a dynamic source for dislocation multiplication. Moreover, being partially or fully glissile, prismatic loops interacting with the sample boundary give rise naturally to the so-called ''singlearm'' sources, which are believed to contribute a significant portion of plastic strain during compression and tension of micro-pillars.…”

A debris mechanism of cyclic strain hardening for F.C.C. metals

“…metals. A by-product of this strain hardening is the creation of prismatic dislocation loops by moving screw dislocations (Fourie and Murphy 1962). On each subsequent cycle these loops must act as obstacles to continued dislocation line motion.…”

Deformation Mechanisms at Different Grain Sizes in a Cryogenically Ball‐Milled Al‐Mg Alloy

“…The dipoles are in fact dislocation loops with elongation along one direction so that they look like a pair of single dislocations with opposite Burgers vectors. The formation mechanism of these elongated loops in fcc metals has been discussed by Fourie and Murphy [6]. Large crystallites transformed into medium-sized crystallites through the formation of small-angle grain boundaries (SAGBs).…”