Akademik Veri Yönetim Sistemi
12th International Artemis Scientific Research Congress, Bucuresti, Romanya, 28 - 31 Mayıs 2025, ss.186, (Özet Bildiri)
In this study, billets composed of pure Al and Al-4%Cu alloys containing functionally graded layers (FGLs) with varying thicknesses and reinforced with TiB₂ (Titanium diboride) were fabricated for use in armor applications, and their ballistic performances were experimentally investigated. The samples were produced in a single step using the gravitational casting method. During casting, TiB₂ particles, serving as the reinforcing phase, were synthesized in-situ, and simultaneously, FGLs of different thicknesses were formed by applying the sedimentation technique.
The characterization of the billets produced for ballistic testing and the results of the Depth of Penetration (DoP) tests were evaluated in two stages. In the first stage, the physical properties of the materials such as microstructure, phase composition, density, reinforcement volume fraction, hardness, and elasticity were examined regionally. In the second stage, ballistic performance was assessed through DoP tests. As a result of the optimizations, Al-based armor samples containing 5, 10, and 15 mm thick FGLs, an Al-Cu-based sample with a 10 mm FGL, and a non-FGL Al-Cu billet without TiB₂ were successfully fabricated. DoP test results from ballistic impacts showed that as the FGL thickness increased to 5 mm, 10 mm, and 15 mm, the penetration depth of the projectile decreased accordingly. Additionally, the incorporation of 4% Cu into the Al matrix improved the mechanical properties and consequently enhanced the ballistic performance of the material. The highest Differential Efficiency Factor (DEF) was calculated for the Al-Cu-based armor sample containing a 10 mm thick FGL. Keywords: Functionally Graded Materials, TiB₂, Ballistic Performance