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Terminal Ballistic Behavior of Tungsten-Rhenium Rod Projectiles

Endballistisches Verhalten von Wolfram-Rhenium Projektilen
: Hohler, V.; Stilp, A.J.; Weber, K.

Murphy, M.J. ; American Defense Preparedness Association -ADPA-, Arlington/Va.:
Ballistics '93. 14th International Symposium. Proceedings
Sundbyberg: National Defence Research Establishment, 1993
ISBN: 0-9618156-8-1
ISBN: 0-9618156-9-8
International Symposium on Ballistics <14, 1993, Quebec>
Fraunhofer EMI ()
endballistische Leistung; halbunendliches Target; penetration; penetration performance; perforation; real target; reales Target; rod projectile; semi-infinite target; Stabprojektil; tungsten-rhenium projectile; Wolfram-Rhenium-Projektil

The terminal ballistic performance of tungsten-rhenium alloy rods has been compared with the behavior of standard tungsten-sinter alloy penetrators. The Re-content is x = 3, 5, 10 and 26% with the static material properties: density around 19.5 g/cm3, UTS = 1500 - 1900 N/mm2 and elongation < 1% to 18%. Rods with calibers of D = 5 - 7.5 mm and length-to-diameter ratios L/D = 10 to 16.3 have been launched with velocities between 1500 - 1800 m/s against semi-infinite, single, double and triple plate targets of steel and against a laminated steel/glass-steel target. Assessment criteria of performance are penetration, residual length and velocity as well as breaking behavior of the penetrators and residual penetration. The WRe-rods achieve some advantage of the longitudinal performance compared with WHA-rods. This behavior is partly maintained for targets with medium lateral loading of the rod during perforation. In case of high lateral loading the W26Re-rods behave similar to the WHA-pen etrators. However, the WxRe-rods with x=< 10% tend to fail with reduced efficiency. The source of failure is the extreme length deformation of the microstructure, caused by the swaging during production.