Abstract
The degree of embrittlement of bicrystal AgCl deformed in aqueous NaBr was studied as a function of the orientation of adjacent grains that make up a boundary and the angle that the grain boundary makes with the tensile axis. Embrittlement was observed when the angle between slip directions in adjacent grains exceeded about 20°. The degree of embrittlement was insensitive to variations in grain boundary angle to the tensile axis except for a boundary completely parallel to the tensile axis. It was concluded that the stress concentration at the head of a slip band with the aid of the environment causes initiation of cracks and that the resolved normal stress is active in propagating these cracks to cause intergranular failure. The embrittlement of notched single crystals of AgCl is attributed to the combined effects of stress concentration at the notch root, environment and the applied normal stress since crack propagation always occurred perpendicular to the applied tensile stress.
Published Version
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