The goal of this project is to investigate the influence of the surface state on the mechanical behavior of austenitic high-alloyed TRIP/TWIP Mn-Al-Si steels. The project's aim is to characterize specific surface morphologies formed by micro and macro machining using microscopic as well as X-ray methods. In addition, we are evaluating the influence of morphologies on quasi static and cyclic properties by in situ mechanical testing in the scanning electron microscope (SEM) as well as fatigue tests with subsequent ex situ analysis of near-surface microstructures. Further, we will manufacture and test prototypes for high performance and wear resistant chain pins.