Internal stress is a terminology often used in high temperature creep as a measure of the internal resistance of polycrystalline materials to creep deformation. Changes in internal creep resistance are often described in theories of dislocation associated work hardening and recovery. Alternatively, internal stress is also created by inhomogeneous elastic, plastic and creep deformations such that when the material is unloaded the misfit strains are revealed as internal stress. The purpose of the proposed experiment is to undertake a feasibility study using in-situ loading combined with the neutron diffraction technique to quantify the internal state generated by creep. The novelty is that we intend to obtain measures of the internal state by subjecting test specimens, extracted from prior creep deformed samples, to increments of tensile or compressive loading at room temperature.