Laser generated TiC reinforced with Fe-Al matrix composite layer on Al-Si alloy

摘要

This paper deals with the study of Al-Si alloy laser melted with variable constituents of TiC and Fe coatings to generate TiC reinforced with Fe-Al matrix composite layer on it. This experimentation deals with the investigation of the quality of the composite layer generated by varying the process parameters and the coating composition. A superior composite layer is established when the variable processing parameters were of 2.5kW laser power and 1.5 m/min. scan speed for the coating composition of 25Fe-75TiC wt. %. This layer which consists of TiC reinforcement with Al—Fe matrix shows an average microhardness of about 750 HV and also exhibits pore and crack free surface. Bonding strength of the composite layer is also examined by the hardness test.