This study investigated the influence direct energy deposition (DED) process parameters have on the metallurgical characteristics (porosity, microstructural evolution, microhardness, and corrosion behavior) of 17−4 PH stainless steel powder. During the deposition, laser power and scanning speed were varied from 300 W to 400 W and from 7.62 mm/s to 12.7 mm/s, respectively while powder feed rate and the hatch overlap were kept constant at 4.7 g/min and 75%, respectively. Coupons were prepared for metallographic characterization in the as-built and heat treated condition. It was established that laser power scanning speed, and heat treatment had a meaningful impact on metallurgical characteristics studied.
Reference:
Mathoho, I., Akinlabi, E., Arthur, N.K. & Tlotleng, M. 2020. Impact of DED process parameters on the metallurgical characteristicsof 17-4 PH SS deposited using DEDI. CIRP Journal of Manufacturing Science and Technology, 31. http://hdl.handle.net/10204/12043
Mathoho, I., Akinlabi, E., Arthur, N. K., & Tlotleng, M. (2020). Impact of DED process parameters on the metallurgical characteristicsof 17-4 PH SS deposited using DEDI. CIRP Journal of Manufacturing Science and Technology, 31, http://hdl.handle.net/10204/12043
Mathoho, I, ET Akinlabi, Nana KK Arthur, and Monnamme Tlotleng "Impact of DED process parameters on the metallurgical characteristicsof 17-4 PH SS deposited using DEDI." CIRP Journal of Manufacturing Science and Technology, 31 (2020) http://hdl.handle.net/10204/12043
Mathoho I, Akinlabi E, Arthur NK, Tlotleng M. Impact of DED process parameters on the metallurgical characteristicsof 17-4 PH SS deposited using DEDI. CIRP Journal of Manufacturing Science and Technology, 31. 2020; http://hdl.handle.net/10204/12043.