WEAR BEHAVIOR OF TINI AND TINI-TIC CLADS DEPOSITED BY TIG SURFACING PROCESS

This paper deals with the investigation of wear behavior of TiNi and TiNi-TiC clads applied to plain carbon steel by tungsten inert gas (TIG) surfacing process. In this regard, ball milled Ti-Ni and Ti-Ni-C powder mixtures were used as feedstock materials. The clad layers were investigated using X-ray diffractometery (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), hardness measurements and reciprocating wear tests. The results of microhardness measurements indicated that hardness values of TiNi-TiC composites were higher than those of TiNi by approximately 100HV. It was also shown that the wear behavior of TiNi-TiC clads was better than that of TiNi. Further investigations indicated that the dominant wear mechanisms in TiNi and TiNi-TiC clad layers were delamination and surface fatigue, respectively.Copyright © 2012 by ASME