OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 24 No. 3 2022 of manufacturing armored elements based on such materials requires the use of rather complex technical solutions and expensive equipment. The armor elements itself based on the above composites having ballistic characteristics comparable to monometallic armor do not compete with it at the requirement of multi-impact, i.e. are not able to withstand multiple hits in local areas due to complete destruction or delamination [7, 9, 14–16]. The development of a new class of composite armor materials that combine high bullet resistance and structural strength along with low specifi c gravity is an urgent task. The Department of Welding, Foundry and Materials Science, FSBEI HE Penza State University has developed a unique technology for the manufacture reinforced composite armor materials based on light metals and alloys that does not have analogues [10, 11]. The metal base of these materials is proposed to use an armored aluminum alloy (V95), and as reinforcing layers of titanium alloy (VT1-0). The metal composite is made using explosive welding technology, which allows obtaining high-quality welded joints of materials and alloys that cannot be welded by traditional methods, which include the above materials. Permanent metal joints obtained by the explosive welding technology are formed at the interatomic level without signifi cant thermal embedding in the contact zone of materials. The strength of the welded joint itself is higher than the strength of the least strong metal of the composition [19]. The purpose of this work is to develop a technology for obtaining a new class of multilayer metal armor materials based on light metals and alloys by explosive welding, combining high rate of bullet resistance and structural strength along with low specifi c gravity. This position will signifi cantly improve the tactical and technical characteristics of the armoured military weapons and special-purpose products. The objectives of the study are to develop a new reinforcing scheme for composite metal materials based on light metals and alloys; to determine rational modes of shock-wave loading, which ensure the production of composite material of the required quality by explosive welding; to describe the mechanism for brittle cracks localizing in the composite structure under ballistic impact on it. Research methodology In the composite reinforcing scheme special perforated layers made of titanium alloy are used (Fig. 1) [12]. The composite may contain two or more such layers. The perforations are arranged so that each subsequent layer does not coincide with the previous perforations and overlap is ensured. This nature of the arrangement of perforations in the composite structure does not allow a possible through passage of a ballistic object. Fig. 1. Perforated reinforcing layer
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