|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing for Energy Applications III
||Experimental and Numerical Investigation of Single Clads Generated by Directed Energy Deposition Additive Manufacturing Processes
||Luis Nunez, John Shelton, Kyu Cho
|On-Site Speaker (Planned)
Directed energy deposition (DED) is a highly complex phenomenon that involves large thermal gradients that are present during laser melting and solidification of both the substrate and filler material. Understanding how the processing parameters effect thermal gradients and clad geometry and development is key to the efficiency, and control of the DED process. In this investigation, clad tracks were fabricated using an OPTOMEC 850M LENS machine located at Norther Illinois University. Empirical relationships were developed that relate the linear mass density, the ratio of the scan speed and powder feed rate, and dilution at various power levels. Additionally, a cross-sectional 2D numerical model of a single clad was developed in order to better understand the melt pool dynamics that play a role in clad generation. This model was used to investigate linear mass density and its effect on thermal gradients, clad geometry and dilution and their relation to microstructure.
||Additive Manufacturing, Characterization,