An electron microscope study of stainless steel deformed in fatigue and simple tension

Abstract

A technique is described whereby the surface of metal specimens can be examined by transmission electron microscopy. The original specimens are thinned by electropolishing from one side; thus the surfaoe contours, e.g. slip steps, are preserved on one of the surfaces. It is shown that dislocations are revealed associated with the surface slip lines; the step heights and surface oontours such as those of fatigue striations are observed at a high magnification due to a taper section effect.