International Scientific Conference BALTTRIB, 2017

TOPOGRAPHY, HARDNESS, ELASTIC MODULUS AND WEAR RESISTANCE OF NITRIDE COATINGS ON TITANIUM

I. M. Pohrelyuk, J. Padgurskas, S. M. Lavrys, A. G. Luk’yanenko, V. S. Trush, R. Kreivaitis
Karpenko Physico-Mechanical Institute of the NAS of Ukraine; Institute of Power and Transport Machinery Engineering, Aleksandras Stulginskis University; Karpenko Physico-Mechanical Institute of the NAS of Ukraine; Institute of Power and Transport Machinery Engineering, Aleksandras Stulginskis University

Abstract

The roughness, hardness and elastic modulus of the surface layers of c.p. titanium after thermodiffusion saturation with nitrogen at temperatures of α and β phase regions were investigated. It was established that the increasing temperature of gas nitriding provided a higher level of surface hardening (hardness, elastic modulus, depth of hardened layer) of the material but worsened the roughness of its surface. The tribological tests of hardened by nitriding c.p. titanium in pairs with 304L stainless steel showed lower friction coefficients in the period of rubbing, where the surface of the titanium was nitrided below the temperature of the transus temperature.

 

DOI: https://doi.org/10.15544/balttrib.2017.09

Keyword(s): c.p. titanium, nitriding, nanoindentation, wear resistance.


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