Taper Sectioning to Magnify the Interface Thickness of a Dissimilar Metal Joint

摘要

Taper sectioning in metallography produces additional magnification across the interface of a dissimilar metal joint. It is possible to examine a very thin diffusion layer, which sometimes is hardly discernible by conventional longitudinal sectioning. This technique was applied to examine the interface of solid-state bonds and friction welds of aluminum (or its alloy) and Type 316 stainless steel. Methods are described for preparing taper sectioning mounts and examining the diffusion layer by various means.