Journal
PHILOSOPHICAL MAGAZINE
Volume 87, Issue 33, Pages 5289-5307Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786430701651721
Keywords
-
Ask authors/readers for more resources
Disconnections are interfacial defects with dislocation and step character; for example, twinning dislocations in homo-phase and transformation dislocations in hetero-phase materials. They play important structural roles and are classified as either 'perfect', separating energetically degenerate regions of interface, or 'partial', bounding a faulted region. In kinetic mechanisms, disconnection motion can be glissile, by conservative climb or climb. In the present paper, disconnection mobility is analyzed in terms of shear and shuffle-type atomic displacements and diffusional flux. This is applied to a sequence of hetero-phase materials with increasing structural complexity, namely the beta to alpha transformation in Ti, theta' precipitation in Al(Cu) and the orthorhombic to monoclinic martensitic transformation in ZrO2. A disconnection source mechanism in Ti, involving conservative climb, is also described.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available