Resolving geometrically necessary dislocation density onto individual dislocation types using EBSD-based continuum dislocation microscopy

The Physics of Singular Dislocation Structures in Continuum Dislocation Dynamics

Dislocations play an important role in the deformation behaviors of metals. They not only interact via long-range elastic stress, but also interact with short-range interactions; they annihilate, tangle, get stuck, and unstuck. These interaction between dislocations lead to interesting dislocation wall formation at the mesoscales. A recently developed continuum dislocation dynamics model that s...

Stress-free states of continuum dislocation fields: Rotations, grain boundaries, and the Nye dislocation density tensor

We derive general relations between grain boundaries, rotational deformations, and stress-free states for the mesoscale continuum Nye dislocation density tensor. Dislocations generally are associated with long-range stress fields. We provide the general form for dislocation density fields whose stress fields vanish. We explain that a grain boundary a dislocation wall satisfying Frank’s formula ...

2 Viewpoint : experimental recovery of geometrically 3 necessary dislocation density in polycrystals

8 Abstract 9 Application of electron backscattering diffraction methods to recover estimates of the geometrically necessary dis-10 location density is described. The limitations of the method arising from the opacity of crystalline materials and the 11 spatial and angular resolution limits are discussed. 15 It has long been an experimental observation 16 that the constituent grains of polycryst...

Effect of Using Tramadol on Shoulder Dislocation

Tramadol abuse and shoulder dislocation

This study aimed to evaluate the shoulder dislocation following tramadol-induced seizure and its potential difference with other shoulder dislocations. We evaluated six cases that used tramadol tablets and some of them had a history of seizure. All of the cases had shoulder dislocation. According to the findings, tramadol use and tramadol-induced seizure may increase the risk of shoulder disloc...