Structural features and technology of light armor composite materials with mechanism of brittle cracks localization

OBRABOTKAMETALLOV Vol. 24 No. 3 2022 110 MATERIAL SCIENCE References 1. Bhatnagar A., ed. Lightweight ballistic composites: military and law-enforcement applications. 2nd ed. Amsterdam, Woodhead Publishing is an imprint of Elsevier, 2016. 482 p. DOI: 10.1016/C2014-0-03657-X. 2. Ma Z.D. Lightweight composite armor. Patent US, no. 0089597, 2007. 3. Gruber U., Heine M., Kienzle A., Nixdorf R. Armored products made of fi ber reinforced composite material with ceramic matrix. Patent US, no. 6709736, 2004. 4. Strasser T.E., Atmur S.D. Fiber reinforced ceramic matrix composite armor. Patent US, no. 6314858 V1, 2001. 5. Chen X., ed. Advanced fi brous composite materials for ballistic protection. 2nd ed. Amsterdam, Woodhead Publishing is an imprint of Elsevier, 2016. 548 p. DOI: 10.1016/C2014-0-01733-9. 6. Lightweight Composite Structures in Transport. Design, Manufacturing, Analysis and Performance / James Njuguna // Woodhead Publishing. – 2016. – P. 474. – DOI: 10.1016/C2014-0-02646-9 Structural features and technology of light armor composite materials with mechanism of brittle cracks localization Dmitry Kryukov* Penza State University, 40 Krasnaya st., Penza, 440028, Russian Federation https://orcid.org/0000-0003-0393-9550, ddbbkk@yandex.ru Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2022 vol. 24 no. 3 pp. 103–111 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2022-24.3-103-111 ART I CLE I NFO Article history: Received: 04 July 2022 Revised: 13 July 2022 Accepted: 21 July 2022 Available online: 15 September 2022 Keywords: Composite metal material Explosion welding Reinforcement Crack resistance Bullet resistance Acknowledgements Research were partially conducted at core facility “Structure, mechanical and physical properties of materials”. ABSTRACT Introduction. Monometallic armor traditionally used in military and special equipment armaments has a number of key disadvantages that have a signifi cant impact on the tactical and technical characteristics of the products, namely, signifi cant weight and thickness. At the same time, composite non-metallic armors, which have been widely used recently as an alternative, in turn, are not able to withstand multiple hits in local areas of the structure due to its complete destruction or delamination. The purpose of the work: to develop the technology of obtaining a new class of multilayer metal armor materials based on light metals and alloys by explosive welding, combining high indicators of bullet resistance and structural strength along with low specifi c gravity. The work presents a new scheme for reinforcing the composite using explosive welding technology, which allows localizing the development of brittle cracks along interlayer boundaries with external ballistic impact on the object. Results and discussion. Reinforced composite material based on titanium and aluminum alloys is obtained by explosive welding. Rational modes of shock-wave loading, which ensure production of composite material of required quality are determined; evaluation of strength of composite is carried out. In order to improve the tactical and technical characteristics of the composite, it was proposed to form high-solid intermetallic layers in its structure due to heat treatment. Rational modes of high-temperature annealing are defi ned, which ensure formation of intermetallic layers of preset thickness in composite structure. The phase composition of intermetallic pro-layers is studied. Structural features of the composite material are investigated. Mechanism of brittle cracks localization in composite structure at ballistic impact on it is described. For citation: Kryukov D.B. Structural features and technology of light armor composite materials with mechanism of brittle cracks localization. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2022, vol. 24, no. 3, pp. 103–111. DOI: 10.17212/1994-6309-2022-24.3-103-111. (In Russian). ______ * Corresponding author Kryukov Dmitry B., Ph.D. (Engineering), Associate Professor Penza State University 40 Krasnaya st., 440028 Penza, Russian Federation Тел.: 8 (8412) 666 262, e–mail: ddbbkk@yandex.ru

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