In channeling analysis, the energy dependences of dechanneling factors show that dominant defects present in the irradiated films are not dislocations, but twins, stacking faults and/or voids.
"Just because the total doesn't show dislocation, it does not mean things are calm under the surface," Mr. Creatura said.
The formation of HCP atoms is associated with the activity of partial dislocations, while defect atoms are composed of not only dislocation cores but also vacancies.
Dislocations thus find it much harder to move in nonmetals; raising the temperature does not increase dislocation motion, and the stress needed to make them yield is much higher.
Patients with chronic Rockwood's type III AC dislocations can either be submitted to surgical stabilization or conservative treatment depending on whether or not the dislocation interferes with their daily activity, job, sports, shoulder strength and deformity.
It is not cultural dislocation that drives her into homelessness and illness, but, as she says, 'a banal story of love'.
Existing theories of strength rely on solute/dislocation interactions, but do not consider dislocation core structures, which need an accurate treatment of chemical bonding.
The present results demonstrate that the template film interaction does not involve dislocation emission but is accompanied by the generation of short-range and long-range strains.
We also describe uniaxial compression experiments on micrometer size pillars of single crystal gold and find surprisingly strong size effects, even though no significant strain gradients are present and the crystals are not initially dislocation free.
These transient phenomena were due to a temporary additional strengthening provided by fine γ′ precipitates lasting for the time necessary to not hinder dislocation motions anymore.
