THE ANALYSIS OF THE EFFECT OF TIME AND TEMPERATURE OF AIR ON THE COLOURING OF THE SURFACE LAYER OF O-Ti2AlNb BASED TITANIUM ALLOY

This study presents the test results of Ti-20Nb-15Al alloy isothermal oxidation in air at 700°C with the consideration of the effect of annealing time on the condition of the surface layer. It was determined that, depending on the heating time, the surface of the tested alloy was characterized by a different colouring. This phenomenon was observed only at 700°C.