“…Among other direct surface sensitive techniques like X-ray Photoelectron Spectroscopy (XPS) [12] and Low Energy Electron Diffrac-(LEED) [13], the Auger Electron Spectroscopy (AES) combines high lateral resolution and high surface sensitivity, as well as the possibility to detect all elements except for H and He. Furthermore, the ability for depth profiling and high analysis speed [14,15] allows to be the method of choice for the in situ investigation of grain boundary segregation [16]. Therefore, the aim of this study was to determine the extent of P and S before and after heat treatment of austenitic stainless steel at grain boundaries, accessible by preparation conditions for a high intergranular fracture part.…”