An Analysis of 5,56mm Aluminum Cartridge Case Burn-Through Phenomenon
FRANKFORD ARSENAL PHILADELPHIA PA
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This work was aimed at understanding the burn-through problem that has impeded orderly engineering development and application of aluminum alloy cartridge cases in high-performance ammunition since the 1890s. It has been shown that a gas path through the wall of an aluminum case, and through which propellant gas can flow during the internal ballistic cycle, is a precursor to the burn-through phenomenon. Solutions to this problem have been found that either prevent propellent gas flow through a path in the case that develops unintentionally during firing of the ammunition, or alter the effect of propellant gas flow through such a gas path. Since an engineering understanding of the burn-through phenomenon is available, work is currently underway to demonstrate the feasibility of aluminum cartridge cases.
- Ammunition and Explosives