Properties and Applications of Surfaces/Components Engineered Using Thermal Spray, Welding, and Directed High Energy Beam Technologies

Dear Colleagues,

Surface engineering refers to treatment of the surface and near-surface regions of a material by a comprehensive array of technologies to allow the surface to perform functions that are distinct from those functions demanded from the bulk of the material. There are two key categories of surface engineering approaches that can be used to enhance the surface properties of the bulk materials. These are surface coatings and surface modification. Surface coating processes involve depositing a layer of molten, semi-molten, or solid state material onto a substrate. One of the main functions of surface coating is to alter and fortify the surface functions instead of ameliorating the composition of the bulk material (thermal/ cold spraying). Surface modification procedures can be categorized as hardening by flame/ arc weld-hardfacing, induction, directed high energy beams (lasers/ electron beams), severe plastic deformation via shot peen/ friction stirring/ friction surfacing, ion implantation, and diffusion treatments. Surface modification treatments also can be combined with surface coating processes. This amalgamation augments the benefits of surface coatings and surface modification, thus achieving explicit requirements and aptness for purpose. Surface engineering is also interconnected to additive manufacturing in cases where the materials are joined in an incremental layered fashion to make parts using a few of the aforementioned deposition processes from a three-dimensional model data. This special issue on the “Properties and Applications of Surfaces/ Components Engineered using Thermal Spray, Welding, and Directed High Energy Beam Technologies”, provides a forum for the publication of refereed material on both the theory and practice of these important enabling technologies, embracing science, technology and engineering. Coverage includes design, surface modification strategies, 3D component manufacturing, process control, characterization, properties of the final system or component, including quality control and non-destructive examination.

Dr. Ramachandran Chidambaram Seshadri
Dr. A.K. Lakshminarayanan
Guest Editors

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