Date on Master's Thesis/Doctoral Dissertation


Document Type

Master's Thesis

Degree Name

M. Eng.


Chemical Engineering

Committee Chair

Starr, Thomas L.

Author's Keywords

Applied sciences


Lasers--Industrial applications; Physical metallurgy


The purpose of this research is to understand how the process parameters surrounding the Direct Metal Deposition (DMD) process affect the properties of the deposition. The powder used in this research is pre-alloyed titanium powder (Ti-6Al-4V), containing 6% wt. aluminum and 4% wt. vanadium. A few process parameters involved with the DMD include the laser power, traverse speed, powder flow rate, and gas flow rates. Due to the detrimental effect of oxygen on titanium, oxygen content is one of the main deposition properties of significance involved with this research. In addition to the oxygen content, the powder efficiency, build rate, and build height per layer are also properties of importance. The experiments varied process parameters such as the laser power, CNC velocity, gas flow rate, powder flow rate, and final deposition geometry. In addition to calculating tool path factors such as the line width and build height per layer, the oxygen content, hardness, density, and mechanical properties were determined for each experiment.