This special issue of the Journal of the Engineering Materials and Technology is dedicated to the memory of our friend and colleague Professor Hussein Zbib who passed away in February 2020. Hussein was a past editor of this journal and was an internationally recognized research leader and innovator in numerous aspects of mechanics of materials, such as dislocation dynamics, plasticity, and irradiated materials. The papers in this special issue, through the different contributions of his collaborators, colleagues, students, and friends, truly reflect the different research areas he impacted. Furthermore, these contributions underscore how his research interests, collaborations, and achievements fundamentally influenced the experimental and modeling accomplishment.