TiC reinforced composite layer formation on Al–Si alloy by laser processing

Author: Viswanathan A.   Sastikumar D.   Kamachimudali U.   Kumar Harish   Nath A. K.  

Publisher: Maney Publishing

ISSN: 1743-2944

Source: Surface Engineering, Vol.23, Iss.2, 2007-03, pp. : 123-128

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Abstract

Al–Si alloy was laser surface treated with various compositions of TiC and Ni under different laser processing parameters to produce a TiC reinforced composite layer on it. The study shows that TiC composite layer is formed when the composition is 75TiC–25Ni (wt-%) and laser power 2·5 kW and scan speed 0·2 m min−1. The layer exhibited an average microhardness of ∼750 HV, which is free from pores as well as cracks and contained TiC and Al–Si phases distributed in the Ni–Al matrix. Mechanical strength of layer is studied by the hardness test.