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Kinetic Energy Penetrator
The Department of Defense has tested Liquidmetal for use as a Kinetic Energy Penetrator (KEP) rod. The KEP, technology that makes armor piercing ammunition work, currently makes use of depleted uranium (DU) because of its density and self-sharpening behavior. Ballistic tests conducted by the Army have shown that the Liquidmetal exhibit self-sharpening similar to the DU KEP, but without the toxicity of uranium.
Image credit: Wikimedia Commons