Abstract
Delamination of the surface layers of brass workpieces was observed during single-grit grinding. In most instances, complete delamination did not occur and the delaminated material was still attached to the workpiece. Transmission electron microscope examination of the ground surface layers showed that they had a fine subgrain structure; no evidence of a dislocation-free surface layer was obtained. Delamination was found to occur in the fine-grained surface layers, and it is suggested that this occurs by a process of shear separation within the fine subgrain structure. The manner in which the delaminated sheets were observed to lift away from the workpiece surface seems to indicate the presence of both residual tensile and compressive stresses within the surface layers.
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