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Problems with materials compatibility were encountered in pyrotechnically driven devices used in a number of ordnance applications requiring rapid mechanical actuation. A fine bridgewire is located in contact with the chemical pyrotechnic, and the charge is ignited by electrical heating of the bridgewire. Evidence of severe corrosion was revealed on examination of the nickel-chromium-iron alloy bridgewire and the nickel-iron alloy pins. Metallic elements in the pin or bridgewire and substantial amounts of chlorine were detected from the x-ray spectra. Morphological changes indicative of decomposition and dissolution were revealed to have occurred in regions of the pyrotechnic that had been...

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