Abstract
This paper describes the experimental work performed on laser metal deposition (LMD) of
titanium carbide powders on pure titanium substrate. The understanding the effect of LMD processing
parameters is vital in controlling the properties of the final product fabricated from the LMD process.
The objective of the study is to characterize the influence of laser scanning speed of metal deposition
of titanium and titanium carbide powders on pure titanium substrate. Microstructural characterization
results showed that the substrate is characterized by two-phase morphology; alpha and beta phase.
Deposit zone microstructures showed that the grains are of continuous columnar in nature. Heat
affected zone region grain areas appear to decrease with increasing in scanning speed for different
samples at different scanning speeds. The height of samples at different scanning was observed to
decrease with increase in scanning speed. Microhardness results showed that the hardness of the
deposits is greater than the hardness of the substrate. Wear resistance performance results showed that
the coefficient of friction of substrate is greater than the coefficient of friction of the deposit samples.
Wear volume loss of material of the substrate is higher than the deposits. The deposit contains
titanium carbide and, as such, this powder has improved the wear resistance performance of the
substrate.