This proposal, that is part of the Bristol-Open University-ISIS long term programme, is to undertake a series of neutron diffraction experiments to gain an understanding of the interaction between the applied and residual stresses in pre-cracked samples extracted from plates of Type 316 stainless steel welded to P91 ferritic steel.This proposal is an integral part of Indo-UK collaborative project funded by EPSRC called ¿DMW-Creep¿. One objective in this EPSRC project is to understand the underlying mechanics and physics of creep failure occurring at and near to the weld interface between two metals.