Abstract
Laser metal deposition (LMD) is an additive manufacturing technology that involves the
combination of metallic powder and laser beam for its consolidation. The process parameters
involved in LMD need to be well understood and implemented correctly before the optimal process
can be achieved. This paper reports the effect of scanning speed on the wear behaviour of laser
deposited samples. The rotary wear method was adopted in order to understand the relationship in
the radii of the wear track. The scanning speeds were varied from 0.0083 m/sec to 0.0333 m/sec
while the laser power of 1.0 kW, the powder flow rate of 1 rpm and the gas flow rate of 2 l/min
were kept constant. Some lateral cracks were observed in the microstructure which was due to the
effect of the thermal stress that was induced during cooling. The laser deposited samples are
suitable for repair in marine industry as the manufacturing process will provide a great control to
the desired material properties with superior performance.