CHARACTERISATION OF BALLISTICALLY TESTED ARMOUR STEEL JOINTS
Keywords:
Armour steel, Ballistic testing, Microstructure, HardnessAbstract
Armour-grade quenched and tempered (Q&T) steel is used for protection of military and non-military vehicles, because of its high energy-absorbing properties. Q&T steels used for armour applications require high strength, notch toughness, and hardness. The deformation and fracture behaviour of welded joints made from quenched and tempered steel closely conforming to AISI 4340 were investigated. The problems encountered in the past were reduced by depositing a soft austenitic stainless-steel buttering layer in between the BM and the hardfaced layer in the AHA joints(A-ASS filler, H – Hardfacing filler) . This study was planned to explore the insights of microstructural behaviour of AHF (A- ASS filler, H-Hardfacing filler, F- Low Hydrogen Ferritic filler). This article reports the changes observed in the microstructural features along the projectile trajectory in a multilayered armour steel joint AHF JOINT (A- ASS filler, F-LHF filler, H – Hardfacing filler) after ballistic testing.
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