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It is shown that in FeAl/Fe3Al/Fe(Al) coatings, formed on a steel substrate using explosion welding and subsequent heat treatment, the main failure mechanism is cohesive failure. Peeling and spalling of coatings occur only at high loads. It has been established that the hardness of a layered FeAl/Fe3Al/Fe(Al) coating with a thickness of 440 μm increases from the substrate to the surface, reaches a maximum at a distance of 200 μm from the surface, and then decreases due to an increase in porosity. Relative wear resistance of the coating is about 1.5 times higher than that of the steel St3 substrate. [ABSTRACT FROM AUTHOR]

Results are provided for a study of an aluminized coating corrosion resistance on the surface of alloys of the Fe–Cr–Al system (fechrals) and austenitic corrosion-resistant steel 12Kh18N10T under conditions of a temperate climate humid atmosphere containing chlorides. Coatings are applied by immersion in a melt. A study of corrosion during variable immersion of specimens in a 3% aqueous solution of sodium chloride show that coatings of the Fe–Cr–Al system prepared by aluminizing withstand long-term exposure to the environment (corrosion rate is 0.0003 g/(m2·day). An aluminized coating on a steel 12Kh18N10T surface has twice as good corrosion resistance indicators than for a coating on a Kh15Yu5 substrate. [ABSTRACT FROM AUTHOR]

It has been shown that heat treatment at 700 °C for 2 h + 910 °C for 1 h of an explosively welded composite M1 (copper) + VT1‑0 (titanium) + AD1 (aluminum) with layer thicknesses that ensure the occurrence of a “through” diffusion makes it possible to obtain a copper surface coating having a hardness of 4–6.5 GPa. The main structural components of such composite are solid solutions based on titanium cuprides (Ti3Cu4, TiCu2, TiCu4) and eutectics TiCu2+TiCu4, while the surface layer consists of a mixture of TiAl3 + CuTi2Al5 phases and a two-phase interlayer CuTi2Al5 + Al4Cu9. The coating structure is free from crystallization defects. In comparison with binary coatings based on intermetallic compounds βTiCu4 and TiCu2, its wear resistance is 1.5 times higher. [ABSTRACT FROM AUTHOR]

The effect of laser treatment parameters for copper cladding applied by explosive welding and subsequent rolling on a titanium surface on coating structure and phase composition is studied. It is shown that the relative (compared with VT1-0 titanium alloy) wear resistance of a coating with an increase in titanium content from 30 to 50% increases at 20°C from 2.9 to 4.4, and at 400°C from 1.7 up to 2.0. [ABSTRACT FROM AUTHOR]