Deformation of Some fcc Metals by Ultramicrotomy

Abstract

Thin foils of Al, Ag, Cu, Cu‐5 at.% Ge, Cu‐9.5 at.% Ge were cut with the ultramicrotome and investigated by transmission electron microscopy. High dislocation densities (>2×10¹¹ cm⁻²) are introduced in all foils except Al. No extended stacking faults were ever observed. Twinning occurs in Ag, Cu, and Cu‐5 at.% Ge, but not in Cu‐9.5 at.% Ge alloys. These results are compared with findings from electrolytically thinned deformed foils.