A simple and efficient method for preparing thin foils from 500 μm tungsten wire

A Practical Approach to the Theoretical Structure of Grain Boundaries

“…Figure 2 is a bright-field electron micrograph from a specimen of niobium stabilized 20 % chromium 25 % nickel austenitic stainless steel. A faceted boundary is apparent and on this boundary determining the origins of voids which lead to the failure of tungsten lamp filaments [32]. In this micrograph one of the sets of grain boundary dislocations is clearly apparent as is a row of small voids pinning the boundary.…”