Single crystal Ni superalloys having a large fraction (often up to 70%) of γ precipitates embedded in a γ matrix (fcc) are well known to show high strength and good creep resistance at high temperatures. The alloys are commercially developed and used as high temperature materials where creep resistance is of the utmost importance, such as turbine blades. The origin of these exceptional properties is essentially because the γ phase (ordered fcc) has large resistance to slip at these high temperatures. The γ phase in most commercial single crystal Ni superalloys has a negative misfit to the matrix γ and the precipitates are cuboidal in shape and are regularly arranged along the matrix . During deformation residual stresses can form as a result of localized plastic deformation caused by the negative misfit. These residual stresses act to drive creep deformation without the presence of an external stress and therefore it is proposed that SALSA is used to determine the residual stress in the γ and γ channels after plastic deformation to develop an understanding of the effect of residual stress on Ni superalloy creep.