Abstract
Titanium alloy (Grade 5) has been regarded as the most useful alloys for the aerospace applications, due to their light weight
properties. The addition of copper to this alloy allows the improvement in the mechanical properties. The increase in the
laser power has influenced the coarseness of the α-Ti lamella; and thus slows down the cooling rate during solidification.
The X ray diffraction method has been used to analyse the residual stresses using the biaxial and shear-stressed model. Very
infinitesimal microns were taken into consideration for the penetration depth. The results generated indicate that a decrease
in the compressive residual stresses is attributed to the increase in the laser power and the variation of the heat input within
the clad during processing. The differences in the thermal expansion with respect to the increase in the volume of deposition
as the laser power increases have significant effect on the compressive residual stress.