Ballistic performance of multi-metal systems

Abstract

Ballistic resistance enhancement of armours and structures has been a prominent area of research over the years. Monolithic metallic plates have been the preferred choice for armours against high-velocity projectiles. High-strength steel is a popular choice for such systems. However, the high areal density deters in accommodating such systems in practical applications which require lightweight products. On the contrary, multi-metallic systems produced by the combination of low-density materials with similar or superior ballistic resistance as their monolithic counterparts have become attractive candidates in defence applications. However, only a limited number of comprehensive studies on the ballistic performance of multi-metal multi-layered targets are available in the literature. Moreover, these studies have drawn contradictory conclusions on the optimum arrangement of different layers and materials within the systems. In addition, existing knowledge in this area is scattered in the literature and there is a need to collate them to enhance the development of multi-metal multi-layered ballistic-resistant plate systems in order to be optimised for ballistic-related armour. This article aims to provide a comprehensive review of the effect of different metals, thickness, fracture mechanisms, feasibility of the connection types and the order of the metallic plates within targets on the ballistic performance.

Interface Hardness Analysis of between IN625 and CoCrMo Manufactured by Pulsed Wave Laser Powder Bed Fusion

“…Often, multiple components need to be assembled together or additional spraying and strengthening treatment [1][2][3][4]. Conventional techniques aimed at bolstering corrosion resistance, including fusion welding and the application of hot or cold coatings, are often ineffective for long-serving valve components and similar parts when it comes to utilizing dissimilar alloy joining techniques [5][6][7][8]. This is because the corrosion-resistant alloy coating is very thin and not resistant to erosion, and the interface area between the two alloys is weak, which is likely to be the site of cracks due to local strain and cannot be used for a long time.…”

Interface Analysis between Inconel 625 and Cobalt-Chromium Alloy Fabricated by Powder Bed Fusion Using Pulsed Wave Laser

“…For example, the chemical plant maintenance team at a large global petrochemical company noticed a requirement for frequent repairs and replacement of valve components, since the plant was operating with acidic fluids with solid-liquid twophase flow, see Figure 1. This resulted in excessive downtime [4][5][6]. The common methods to enhance corrosion resistance include cold/hot coating, fusion welding, etc.…”

Numerical simulation of behavior of multi-layered metal targets impacted by high-velocity striker

“…Nowadays the behavior of multi-layered metal targets impacted by high-velocity strikers is a controversial issue. 1 This refers to the fact that the impact response of multilayer targets is not always unambiguous. The methods of bonding layers are also little studied.…”