Abstract
The most commonly used aerospace titanium
alloy, Ti6Al4V, was deposited on Ti6Al4V plate of dimension
72 x 72 x5mm. The laser power of 3 kW, powder flow rate of
1.44 g/min and gas flow rate of 4 l/min were used throughout
the deposition process. The transverse/ scanning speed was
varied between 0.005 to 0.095 m/sec according to established
result of the preliminary study that produces full dense and
pore free deposits. The mass of the deposited powder was
obtained by weight the substrate before deposition and
reweighing after deposition. The substrate and the deposits
were thoroughly cleaned using wire brush and acetone to
remove unmelted powder particles from the surface of the
substrate and the deposit. The height and width of the deposits
were measured with Venier Caliper and the material
efficiencies were determined using developed equations. The
effect of the scanning speed on the material efficiency and
deposit height were extensively studied and the results showed
that for the set of processing parameter used in this study the
optimum scanning speed is approximately 0.045 m/sec.