Abstract
The present work describes microstructure, texture, mechanical and ballistic properties correlation of a hot rolled and peak aged AA-7017 alloy plate at surface and centre. Both the microstructures and textures are different on the surface and centre of the plate. The surface of the plate shows recrystallized grains and a weak over all texture. The centre of the plate displays elongated grains and a sharp texture. Tensile properties, hardness and impact toughness are evaluated at surface and centre of the plate. It is observed that strength and hardness is high at centre, whereas ductility and impact toughness is more at the surface. Ballistic properties of the plate at centre and surface are measured by impacting against two different 7.62 mm deformable projectiles. The plates impacted on the surface shows better ballistic resistance. Ballistic performance of the plate at surface and centre has been correlated with the microstructure, texture and mechanical properties.
Highlights
Ballistic impact research has been focused on developing lighter materials which can resist the threat successfully
Ballistic performance of the plate at surface and centre has been correlated with the microstructure, texture and mechanical properties
The back scattered electron (BSE) image of the plate displays the presence of two types of precipitates with bright and dark contrasts (Figure 5)
Summary
Ballistic impact research has been focused on developing lighter materials which can resist the threat successfully. High strength aluminium alloys have drawn attention for protection against ballistic impact applications due to their high strength to weight ratio and energy absorption capability. These alloys can give good or even better ballistic protection per unit weight compared to those of the traditional steels [8] [11] [12]. The aluminium7017 alloy is an Mg-Zn precipitation-hardened alloy and is one of the commonly used armour material in the form of rolled plates
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