In our research program the overall goal is to explore residual stress effects on fracture of engineering steels at high temperatures. Towards this goal, we need to understand the evolution of stress/stain at the crystal/grain level and the damage accumulated near grain boundaries in polycrystals. Therefore a crystal-plasticity micromechanics model has been developed. To quantify the grain-orientation-dependent lattice strain evolution and the residual lattice strains after prestraining at room temperature, uniaxial measurements with in-situ neutron diffraction (ND) analysis for lattice strain evolution are proposed for a 316H stainless steel specimen at room temperature.