Investigation of Penetration Performance of Zr-based Amorphous Alloy Liner Compared with Copper

Abstract

Zr-based amorphous alloy is a new type of metastable energetic material, which has been exploringly used to design shaped charge (SC) liners by scholars of the military industry. In order to know well how the stand-off distance influences jet penetration performance of liners made by such energetic materials against metal targets, SC static explosion tests were conducted under the same initiation and target conditions but different stand-off distances compared with copper liners. Test results indicate that the jet depth of penetration (DOP) of Zr-based amorphous alloy liners firstly increases slowly and then decreases sharply as the stand-off becomes larger. The optimum stand-off distance is 3.5 times of charge diameter (CD) and the corresponding maximum DOP is about 2.68 CD against the 45# steel plate. The perforation area varies with the stand-off distance. It reaches the maximum when the stand-off is 3.5 CD and the corresponding perforation diameter is about 42mm, also the penetration hole is nearly circular. The jet DOP of Zr-based amorphous alloy liner is smaller than that of copper liner’s while the perforation area is the opposite. The former DOP is about 55.7% of the latter and the former perforation area is about 2.8 times of latter when the stand-off distance is 3.5 CD.

Experimental Study on the Damage Performance of the Zr-based Amorphous Alloy Jet against Steel Target

“…However, as can be seen from the surface pattern subsequent to the penetration of the target, no evident traces of main perforation were found on the steel targets when the stand-off distance reached 21.0 CD. Instead, several groups of sputtering pits with small area and depth were formed with a large range dispersion (reaching roughly 90 mm in diameter).The experimental result indicates that the Zr-based amorphous alloy jet can cause dispersion and granulation during long-distance flight, which is consistent with the research conclusion of previous literature [15] and [25]. Under the circumstances with the stand-off distance of 3.0 CD, 6.0 CD and 21.0 CD, the perforation entrance diameter of copper jet reached about 21 mm, 24 mm and 25 mm, respectively, smaller than that of the perforation entrance of amorphous alloy jet.…”

The EFP Formation and Penetration Capability of Double-Layer Shaped Charge with Wave Shaper

“…Liu [ 14 ] used the grey system theory to analyze the influence laws of the related parameters on the formation of EFPs. In addition, many new materials have been applied to the liner of shaped charges [ 15 , 16 , 17 , 18 ], which improves the penetration capability and damage aftereffect of shaped charges. Müller [ 19 ] proved through experimental research that detonation waves in SCWS collide with each other and meet certain conditions that will form a Mach wave and produce overdriven detonation.…”