Prospects for the Application of Surface Treatment of Alloys by Electron Beams in State-of-the-Art Technologies

Abstract

ProsPects for the aPPlication of surface treatMent of alloys By electron BeaMs in state-of-the-art technologies recent papers on the application of intense pulsed electron beams for surface treatment of metals, alloys, metalloceramic and ceramic materials are reviewed. The advantages of pulsed electron beam application as compared with laser beams, plasma flows, ion beams are mentioned. Promising trends of the electron-beam processing application are analysed: (1) the surface smoothing, the elimination of surface microcracks with simultaneous change in structural-phase state of the surface layer for creating the high production technologies of finishing treatment of critical metal products of intricate shape from Ti-6Al-4V alloy and titanium, steels of different classes, WC-10 wt.% Co hard alloy, aluminium; (2) the removal of microburrs being formed in manufacturing of precision moulds (SKD11 steel) and biomedical materials (Ti-6Al-4V alloy); (3) the finishing surface treatment of moulds and dies; (4) the improvement of functional properties of metallic biomaterials: stainless steel, titanium and its alloys, the titanium-nickelide-based alloys possessing the shape memory effect, magnesium alloys; (5) the treatment of medical materials and implants; (6) the formation of surface alloys for powerful electrodynamic systems; (7) the improvement of characteristics of aircraft engine and compressor blades; (8) the formation of thermobarrier coatings being applied to combustionchamber surface; (9) the increase in fatigue service life of steels and alloys; (10) the hardening of rails' tread surface. As shown, at a correct selection of process parame

Enhancing the Oxidation Resistance of NiCrAlY Bond Coat by High-Current Pulsed Electron Beam Irradiation

“…The oxides of the original NiCrAlY coating mainly contain Al oxides, as well as Cr and Ni oxides, which had adverse effects on the oxidation resistance of the coating. In the thermal barrier coating system, the improvement of the oxidation resistance of the adhesive layer can make the generated TGO relatively smooth and compact, thanks to which the coating becomes difficult to fall off; thus, it significantly improves the service life of the thermal barrier coating [17,28].…”

“…Compared with laser beam and pulsed ion beam, high-current pulsed electron beam technology has a high degree of monitoring and adjustment of the injected energy, which is conducive to a high degree of local energy distribution and a high effective action coefficient. Moreover, the high-current pulsed electron beam irradiation is a pure energy transport process, which overcomes the impact of ion impurity on the material during the ion beam irradiation; the depth of the modified layer is much larger than that of the high intensity pulsed ion beam, and its energy utilization rate is much higher than that of the laser beam [17][18][19][20][21].…”

Effect of electron beam treatment on the structure and properties of AlCoCrFeNi high-entropy alloy

“…One of the most promising and highly effective methods of surface hardening of products is electron-beam processing [15,16]. Electron beam processing provides ultrahigh heating rates (up to 10 6 K/s) of the surface layer to predetermined temperatures and cooling of the surface layer due to heat removal to the bulk of the material at speeds of 10 4 -10 9 K/s, resulting in the formation of non-uniform submicron nanocrystalline structural phase states.…”

Структура Зоны Контакта Наплавка-Подложка, Подвергнутой Электронно-Пучковой Обработке

“…В целях улучшения свойств поверхности ВЭС их подвергают различным видам обработки [14]. Одним из перспективных высокоэффективных методов модифицирования поверхности является электронно-пучковая обработка [15]. Она обеспечивает сверхвысокие скорости нагрева (до 10 8 K/s) поверхности и ее охлаждения за счет теплоотвода в основной объем материала.…”

“…Она обеспечивает сверхвысокие скорости нагрева (до 10 8 K/s) поверхности и ее охлаждения за счет теплоотвода в основной объем материала. В результате образуются неравновесные субмикро-и нанокристаллические структурно-фазовые состояния, происходит гомогенизация химического состава [15].…”