Redistribution of alloying elements in the surface region of titanium alloy VT-23 during glow discharge nitriding

Resumo

VT-23 titanium alloy is processed in the plasma of abnormal glow discharge in a gas mixture of N₂ and Ar under a total pressure of 4 mbar and a partial pressure ratio of N₂ : Ar = 3 : 2 at 900°C. The phase composition of the alloy is determined, the cross-section structure is studied by electron microscopy, and maps of the elemental composition in the cross section are obtained. The distribution of alloying elements and nitrogen is found to be inhomogeneous in the surface region.