Advanced materials such as polycrystalline Ni superalloys put increased pressure on developing appropriate thermomechanical procedures, which avoid the generation of large residual stresses. In forgings the residual stresses develop due to the component geometry setting up significant variations of cooling rates across the part, particularly during quenching. Annealing is then carried out on each component in order to relax these stresses. This must be accounted for during processing as the mechanical properties imparted will be subject to the residual stresses that remain in the component after quenching.The aim of this experiment is to study 'in-situ' the effect of annealing on relaxing residual stresses generated during quenching We hope to use this data to broaden our knowledge of stress relaxation and validate current FEM predictions.