  We report evidence of Re and Mo segregation (up to 2.6 at.% and 1 at.%) along
with Cr and Co to the dislocations inside of {\gamma}' precipitates in a second
generation Ni-based single crystal superalloy, after creep deformation at
750{\deg}C under an applied stress of 800 MPa. The observed segregation effects
can be rationalized through bridging the solute partitioning behavior across
the {\gamma}/{\gamma}' interface and the pipe diffusion mechanism along the
core of the dislocation line. This understanding can provide new insights
enabling improved alloy design.
