Gleb Turichin

By G. A. Turichin

Laser and hybrid laser-arc welding are used at present in modern industry, having many advantages over traditional welding technology. Sectors such as the automotive industry, shipbuilding, aviation and space industry, chemical machinery, defense industry, and so on cannot be imagined without these technologies. Possibility of dramatic increase of weld joint properties, robustness, and high level of process automation makes the technology of laser and hybrid material processing a prospective part of the industry. At the same time, physical complexity of these processes, their cross-science nature, and necessity in high-level skilled stuff require many efforts for wide and successful industrial implementation. Present manuscript, devoted to discussion of physical peculiarity of laser and hybrid laser-arc welding of metals, approaches to physical-based design of technological equipment, as well as examples of industrial applications of laser and hybrid welding concerning the possibility to control welded metal structure and properties, is one of the steps on this way.

Part of the book: Joining Technologies

By Marina Gushchina, Olga Klimova-Korsmik and Gleb Turichin

The chapter presents the basic aspects of the use of metal powders in one of the main additive technologies—direct laser deposition (DLD). Direct laser deposition refers to a group of direct energy deposition (DED) methods and is analogous to Laser Metal Deposition (LMD) technology. The main requirements applied to DLD used metal powders are analyzed and substantiated. The influence of the basic properties of the powders on the quality of the deposited samples is demonstrated. An example of incoming quality control of powders, allowing its application in DLD technology, is presented. The results of experimental research on obtaining quality control samples for the most used metallic materials are presented. The results of structure and properties studies for the main groups of alloys based on iron, nickel, and titanium are shown. The potential for manufacturing products for various areas of industry using DLD has been demonstrated.

Part of the book: New Advances in Powder Technology