Nanoindentation investigation on the creep behavior of P92 steel weld joint after creep-fatigue loading

Fig (a) Illustration of the position of the specimens relative to the weld and the pipe thickness; (b) Spatial nanoindentation hardness contour in the welded joint; (c) Cyclic stress relaxation observed during the creep-fatigue interaction test; (d) Creep-fatigue interaction hysteresis loop of HAI 925 sample after 1 and 2000 loading cycles; (e) The observed strain rate sensitivity for the four regions in the P92 steel welded joint.