|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advances in Environmental Technologies: Recycling and Sustainability Joint Session
||Environmental Implications of Laser Metal Deposition: The Role of Feedstock Powder and Material Utilization Fraction
||Kaka Ma, Julie M Schoenung
|On-Site Speaker (Planned)
Metal additive manufacturing (AM) has emerged as a new sustainable metallurgical processing technique attributed to its capability of creating near-net shapes in a single-step, reducing the need for machining. More than 80% of the feedstock, however, does not go into the final metal part and becomes waste powder. The present work aims to evaluate the environmental implications of laser assisted direct metal deposition, a representative category of AM techniques, paying particular attention to the impact of producing feedstock powder and the actual material utilization fraction. A model taking into account a weighting factor to incorporate the environmental impact of the waste powder was applied to evaluate material/energy consumption. Results indicate that recycling the waste powder is important to improve the environmental sustainability of laser metal deposition. To explore the potential to reuse the waste powder for subsequent deposition, waste powder was collected for microstructural characterization.