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SLM

3D part manufacturing based on fusing of metal powder particles via complete melting with a high-power laser. SLM uses metal powders with a single melting temperature which are produced through atomization and then laid over the entire printing surface evenly for each layer. Un-melted powder can be recycled. SLM parts have a rough surface, and use supports for small angles, hangovers, and sticking the design to the printing surface, which implies a need for machining after printing. Difficult removal of support structures discourages large hollow sections in printed parts. SLM produces parts with a fine microstructure, which offers higher yield strength but might result in anisotropy.

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DED

3D part manufacturing process where a metal feedstock in the form of metal wire or powder is melted using a directed heat source, depositing the melted material directly onto the building platform, resulting in a higher deposition rate. This allows for the production of larger parts with relatively low resolution and part complexity. DED is often also used to deposit melted material on to existing parts, either for addition of features or repairs.

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