Experimental observations on the accomodation dislocation pattern for a low symmetry gradient orientation
Document Type
Article
Publication Date
7-1-1989
Department
Department of Materials Science and Engineering
Abstract
The accommodation dislocation pattern for a concentration gradient oriented along a low symmetry direction (approximately [013]) has been characterized by standard transmission electron microscopy techniques. A number of interesting features were found, including extensive node reactions, a large screw component, dislocation lines lying out of the isoconcentration planes, and broken mirror plane symmetry. In situ hot-stage electron microscopy has been used to study the evolution of the dislocation pattern. The observed migration directions of the dislocations are not parallel to the gradient direction. A cooperative mechanism was observed by which the dislocation network could be translated by a double node reaction.
Publication Title
Materials Science and Engineering A
Recommended Citation
Hackney, S. A.
(1989).
Experimental observations on the accomodation dislocation pattern for a low symmetry gradient orientation.
Materials Science and Engineering A,
113(C), 75-84.
http://doi.org/10.1016/0921-5093(89)90295-5
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/5737