DARPA Works to Perfect Self-Forging, High-Velocity 'Spears'
- They are calling it MAHEM, which stands for Magneto Hydrodynamic Explosive Munition. The intent is to create a device that creates a powerful enough electromagnetic field to propel streams of molten metal at enemy armor. If it works, the device will be a big improvement on a technology that got its start in World War II â€” the self-forging penetrator.Self-forging penetrators, as they are currently used, result from a conventional chemical explosion directed against a specially-shaped metal liner. When the device is set off, the blast causes the metal liner to achieve a new shape, suitable for penetrating deep into even moderately armored vehicles, and driven forward at a high velocity. The technology dates back to WWII.