Abstract
The material characterization of a novel new armour steel with comparison to a leading commercial benchmark alloy is presented. Direct ballistic and experimental comparison is drawn. The 5.56 × 45 mm [M193] and 7.62 × 51 mm [NATO Ball] projectiles were used in a cartridge type high pressure barrel configuration to evaluate the superior plugging resistance of the new steel over a range of plate thicknesses. To characterize the dynamic plasticity of the materials, quasi-static, notched and high temperature tensile tests as well as Split Hopkinson Pressure Bar tests in tension and compression were performed. The open source explicit solver, IMPACT (sourceforge.net) is used in an ongoing numerical and sensitivity analysis of ballistic impact. A simultaneous multi variable fitting algorithm is planned to evaluate several selected numerical material models and show their relative correlation to experimental data. This study as well as micro-metallurgical investigation of adiabatic shear bands and localized deformation zones should result in new insights in to the underlying metallurgical and physical behavior of armour plate steels during ballistic perforation.
Highlights
500 HB application, where the armour plate is fabricated into the vehicle chassis and where the 7–8 mm armour plate would provides adequate resistance to the NATO STANAG 4569 Level 1 ballistic threat [1]
Characterization of impact events near the ballistic limit of the material is defined as partial penetration if light is not observed to pass through the witness plate or complete penetration if the light passes through the witness plate
The ballistic test indicates that Alloy1 requires a minimum thickness of 7.5mm, while both the tempered variant and the benchmark steel seem to require 9 mm for STANAG Level 1 6
Summary
500 HB application, where the armour plate is fabricated into the vehicle chassis and where the 7–8 mm armour plate would provides adequate resistance to the NATO STANAG 4569 Level 1 ballistic threat [1]. This experimental ballistic resistive material Alloy1 [8], a tempered variant Alloy T200 and a leading commercial ballistic benchmark material have been tested. The normal tensile tests, high temperature tensile tests, notched tensile tests and high strain-rate SHPB tests results are summarized with the ballistic test procedure and results discussed in detail
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