Explosive Bonding of Refractory Metal Liners

Report No. ARL-TR-3267
Authors: William S. de Rosset
Date/Pages: August 2004; 43 pages
Abstract: TPL, Inc. has successfully bonded a pure tantalum liner to the inside of an M242 Bushmaster barrel using a low-detonationvelocity explosive. This report examines the governing equations of the explosive bonding process as they apply to this particular situation. The relevant properties of other higher strength tantalum alloys are examined to see if they are suitable for explosive bonding, with the expectation that they would be better able to resist the wear forces at the rifled bore surface. For all candidate materials, attention is paid to the values of critical impact pressure, the critical flow transition velocity, the critical angle for jet formation, and maximum flyer plate velocity. Example plots are provided to indicate the bounds of explosive welding parameters that will result in a good bond.
Distribution: Approved for public release
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Last Update / Reviewed: August 1, 2004