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Effect of Grain Boundaries on Plastic Deformation of Sodium Chloride
Author(s) -
LONG STANLEY A.,
McGEE THOMAS D.
Publication year - 1963
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1963.tb14621.x
Subject(s) - grain boundary , materials science , deformation (meteorology) , tilt (camera) , dislocation , birefringence , grain boundary strengthening , crystallography , composite material , twist , geometry , optics , microstructure , chemistry , mathematics , physics
Sodium chloride single crystals were joined at a melt zone with a hot‐wire technique to produce bicrystals of controlled crystallographic orientation. The plastic deformation properties of the bicrystals were measured in bending while the birefringence was observed with a petrographic microscope. The birefringence at the boundary was interpreted to indicate that significant deformation across the grain boundaries occurred. The stress required for deformation across the boundary was found to increase with increased angle between crystallographic axes. Twist boundaries were found to be more resistant than tilt boundaries. Behavior was consistent with the dislocation model for grain boundaries.