Fig. 3From: Variation of nanoparticle fraction and compositions in two-stage double peaks aging precipitation of Al−Zn−Mg alloyThree-dimensional reconstruction of specimens in different second-stage aging states: a UA, c PAI, e PAII, and g OA. The composition profiles through marked typical nanoparticles in a, c, e, and g were measured using a selected cylinder (diameter, 3 nm) with a moving step of 0.5 nm and shown in b, d, f, and h, respectivelyBack to article page