Although nanocrystalline materials do exhibit outstanding mechanical properties, the underlying correlation between their nanoscopic microstructure with a large volume fraction of grain boundaries and nanoscopic the plasticity-fracture process interactions still remain unclear. Here, in situ nanodiffraction will be used to characterize nanocrystalline supersaturated FeCr alloys machined using FIB as cantilevers during stepwise loading. We aim to follow nanoscopic crack propagation and elasto-plastic deformation using SAXS and to simultaneously assess X-ray elastic strain and texture evolution at the crack tip using WAXS. The experiment will be performed using a dedicated in situ micromechanical stage developed for ID13 and complemented by numerical analysis. The results will uncover the nanoscopic plasticity-fracture process interactions at the crack tip of nanocrystalline FeCr, aiming to better understanding of semi-brittle fracture.