Observations of Spark-Erosion Damage in Copper Crystals

Abstract
The damage introduced by electrical discharge machining was investigated in low‐dislocation copper single crystals with a view toward determining the acceptability of the technique for the preparation of nearly perfect crystals. The damage was observed by anomalous x‐ray transmission, etch‐pitting, and x‐ray rocking curve halfwidths. It was concluded that with due care this technique could be used successfully, even for relatively soft crystals.