Fig. 2From: Variation of nanoparticle fraction and compositions in two-stage double peaks aging precipitation of Al−Zn−Mg alloyBF HRTEM images of typical nanoparticles in different states of the second-stage aging process: a UA, b PAI, c PAII, and d OA. Selected area electron diffraction (SAED) patterns near [110], [011], [011], and [001] zone axis are shown as insets in a–d, respectivelyBack to article page