Additive manufacturing (AM), considered by many to be a revolutionary invention, is a manufacturing process that relies on layer-by-layer technology to build an object. 3D printing has few restrictions on building an object. In this thesis a short description of the traditional manufacturing processes of CNC milling, Forging and AM, in particular, laser wire Directed Energy Deposition, lw-DED which uses laser to melt wire in the process. In this particular case, the use of stainless steel duplex 2205 is chosen because of its broad use and application.

A hypothetical semi-sphere of 100 kg was considered. The purpose of this work was to identify the energy usage and CO2 footprint of lw-DED which is one of many additive manufacturing alternatives to forging and CNC milling. With the calculated energy usage and CO2 footprints, a sustainable development was assessed andcircular economy perspective highlighted. The results from the project showed that the most of the energy and CO2 footprint occurred in the production of duplex 2205. The advantage of lw-DED is its ability to minimize material waste due to the technology. There is room for improvement and opportunities to implement AM in similar manufacturing processes.