Introduction to Additive Manufacturing
AM is an umbrella term for a group of technologies that creates physical products through the addition of materials (typically layer by layer) rather than by subtraction (e.g., through machining or other types of processing).
Stories and perspectives appear in the popular press and technology blogs on a daily basis. Enthusiasts tout the prospect for AM to revolutionize manufacturing industries and the markets they serve. Skeptics point to the relatively limited number of uses and materials in current practice and to the relatively small impact these technologies have had outside of a few niches. Critics raise concerns about applications (e.g., 3D printed guns) and the inevitable intellectual property issues that the increasing adoption of AM technologies will create.