| The purpose of this research is to understand how the parameters involved with Direct Metal Deposition (DMD) process affect the properties of deposited material. The powder used in this research was pre-alloyed titanium powder (Ti-6Al-4V), containing 6% wt. aluminum and 4% wt. vanadium.; Establishing the relationship between process parameters and the quality of deposit led to process design and control. The process parameters investigated include laser power, Computer Numerical Control (CNC) velocity, substrate temperature, and powder flow rate. A 24 half fractional factorial design resulting in 8 experimental runs was conducted. Hardness, microstructure, yield of Ti-6Al-4V powder and phases developed during each deposition run were determined and statistically analyzed for the effect on above mentioned process parameters. In addition, tool path factors such as build height per ten layers and oxygen content were also statistically analyzed. (Abstract shortened by UMI.)... |
