Structure and Properties of Ti-Al-Ta and Ti-Al-Cr Cladding Layers Fabricated on Titanium

Being one of the most high-demand structural materials, titanium has several disadvantages, including low resistance to high-temperature oxidation and wear. The properties its alloys can be improved by applying protective intermetallic coatings. In this study, 2 mm thick Ti-Al-Ta Ti-Al-Cr layers were obtained on workpieces a non-vacuum electron-beam cladding. microstructure phase compositions samples different for various alloying elements. Cr-containing layer consisted α2, γ, B2 phases, while Ta-containing additionally ω′ (P3¯m1). At same atomic concentrations aluminum an element in both layers, volume fraction B2/ω Ti-41Al-7Ta alloy was significantly lower than Ti-41Al-7Cr alloy, amount γ higher. had highest wear (2.1 times higher that titanium). maximum (8 compared titanium) observed layer.