The etching of fresh and grown-in dislocations on the chemically polished (100) surface of Fe-3% Si alloy single crystals and fresh dislocations on the same surface of Fe-7% Si alloy single crystals in a 1–2% nital is described. Antiphase domain boundaries are revealed by the same etching on the surfaces of Fe-7% Si alloy single crystals with different crystallographic orientation.
The author is grateful to Dr.
esták for helpful discussions during the course of this investigation and to Dr. Kroupa for reading the manuscript.