Multiple characterization (e.g., TEM/STEM, 3DAP, x-ray/neutron diffraction) techniques, and modeling and simulation tools (e.g., first principles calculations, Monte Carlo methods, cluster expansions, Molecular Dynamics) are used to investigate phase transformations at the atomic scale. The complementary nature of these experimental techniques, as well as the combination of experimental techniques with modeling and simulation can provide powerful synergies for these investigations. This symposium will give emphasis to studies where multiple techniques and/or computational materials science tools have been coupled for the study of phase transformations at the atomic scale.Peer Reviewe