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Additive manufacturing is the process by which techniques of adding material to a working area and building upon existing material are employed to create a final product consistently and reliably. Although modern techniques like 3D printing are talked about mostly when addressing additive manufacturing, the term has been applied to many techniques dating back to when blacksmithing was the primary metal forming method.
The process of 3D printing metal is very similar to welding and the same issues are generally present. Porosity, cracks, undercuts, and more problems can occur during a printing process. Certifying that the part will work as designed requires testing of the material as well as sample testing of the part. In order to guarantee these tests, prototyping a printing process is important.
