manufacturing
- Steel and Alloys Explained: How Carbon and Chromium Work
Steel is iron with a little carbon, and carbon atoms block the crystal defects that let iron bend, which is why steel is so much stronger than pure iron. - 3D Printing: Additive Manufacturing
How 3D printing builds objects layer by layer — the main technologies (FDM, SLA, SLS, metal powder-bed), where they win against machining, and where they still lose.