Abstract
The influence of process parameter on corrosion behavior of the most widely
used titanium alloy-Ti6Al4V, produced using laser metal deposition process was
studied. The processing parameters: scanning velocity, the powder flow rate and gas
flow rate were kept at constant values of 0,005m/s, 1.44 g/min and 4 l/min while the
laser power was varied between 0.8 to 3.0 kW. Electrochemical corrosion test was
conducted on each of the samples produced at each set of processing parameters. The
corrosive media used is the solution of sodium chloride (NaCl) desolved in deionized
water. The results of this study indicate that the as the laser power was increase, the
corrosion behaviour was found to be improved. The better corrosion resistance
performance of the additive manufacture part can be attributed to the higher cooling rate
that is associated with this type of manufacturing process. This high cooling rate results
in the higher hardness of the material which could also contribute to the improved
corrosion resistance behaviour.