  The role of TCP phases in deformation of superalloys and steels is still not
fully resolved. In particular, the intrinsic deformation mechanisms of these
phases are largely unknown including the active slip systems in most of these
complex crystal structures. Here, we present a first detailed investigation of
the mechanical properties of the Fe7Mo6 {\mu}-phase at room temperature using
microcompression and nanoindentation with statistical EBSD-assisted slip trace
analysis and TEM imaging. Slip occurs predominantly on the basal and prismatic
planes, resulting also in decohesion on prismatic planes with high defect
density. The correlation of the deformation structures and measured hardness
reveals pronounced hardening where interaction of slip planes occurs and
prevalent deformation at pre-existing defects.
