National Mining University (Dnepropetrovsk, Ukraine):

Didyk R., Dr. Eng., Prof.
Kozechko V., Cand. Eng., Ass. Prof., e-mail: kozechko@list.ru

The first explosion welding has been used for multilayer composites with a high fracture toughness resource. Analysis of the results of tests on samples of layered cycle fatigue under pulsating tensile cycle has allowed to establish the kinetics of fatigue failure, which depends on the physical and mechanical condition of the interlayer boundaries of welding. On the basis of fundamental research of symmetric elements, layered compounds in cladding explosion, theory and developed complex system of calculation of technological parameters of manufacturing thin-walled parts have been analyzed. The fruitfulness of the ideas presented in the studies that relate to the explosion welding, is a principled assessment of the hydrodynamic model for the calculation of the initial parameters of the collision of solids, as well as the selection and justification of types of process equipment and explosives. The effect of the shock-wave hardening has been examined depending on the position of the detonation front. Boundary parameters of shock-wave loading of metal in contact explosion are defined. Explosive hardening effect depending on the detonation front in contact explosion is established. Regularities of forming and propagation of fatigue cracks have been revealed; they have displayed that crack propagation in the copper layer leads to serious speed decrease (appr. by 40 %).

1. Didyk R. P., Masakovskiy E. A. Issledovanie polya dinamicheskikh napryazheniy pri impulsivnom nagruzhenii (Investigation of dynamic stress field during the impulsive stressing). Prikladnaya mekhanika = Applied Mechanics. 2010. Vol. 35, No. 2. pp. 65–69.
2. Didyk R. P., Olishevskaya V. E., Bosov A. A. Modelirovanie mnogosloynykh kompozitsionnykh materialov povyshennoy treshchinostoykosti (Modeling of multilayer high crack resistance composites). Sistemni Tekhnologіi = System technologies. 2008. No. 3. pp. 3–5.
3. Didyk R. P., Kuznetsov E. V. Analiz vliyaniya dinamiki nagruzheniya na deformatsionnoe povedenie metallov i ikh splavov v plasticheskoy oblasti (Analysis of infl uence of stressing dynamics on deformation behavior of metals and their alloys in plastic area). Dopovidi Natsіonalnoi akademіi nauk Ukraini = Reports of the National Academy of Sciences of Ukraine. 2008. No. 1. pp. 49–55.
4. Bezrukavaya V. A., Didyk R. P., Zil V. V. Puti preodoleniya tribologicheskogo barera v tselyakh povysheniya resursa gornogo oborudovaniya (Ways of tribological barrier overcoming for the purpose of increasing of mining equipment resource). Gornyi Zhurnal = Mining Journal. 2011. No. 2. pp. 54–57.
5. Mali V. I. Strucrural fentures of wave formation in explosive welding. Tornss press. 2010. pp. 42–43.
6. Lysak V. I., Kuzmin S. V. Lower boundary in metal explosive wel ding. Evolution of ideas. Journal of Materials Processing Technology. 2012. Vol. 212, Iss. 1. pp. 150–156.
7. Rybin V. V., Ushanova E. A., Kuzmin S. V., Lysak V. I. Explosively welded materials bond zone: morphology and Crystallography. Reviews on Advanced Materials Science. 2012. Vol. 31. pp. 74–77.
8. Lyzenga G. A., Ahrens T. J., Nellis W. J., Mitchell A. C. The temperature of shock‐compressed water. Journal of Chemical Physics. 1982. Vol. 76, No. 12. pp. 6282–6286.
9. Bataev I. A., Bataev A. A., Mali V. I. Uvelichenie udarnoy vyazkosti sloistykh kompozitov, poluchennykh metodom svarki vzryvom stalnykh plastin (Increasing the impact strength of layered composites, obtained by steel plate explosion welding). Zababakhinskie nauchnye chteniya (Zababakhin scientific talks). 2010. pp. 24–28.
10. Kovalevskiy V. N. Otsenka rabotosposobnosti i razrusheniya sloistykh materialov, poluchennykh svarkoy vzryvom (Assessment of working capacity and destruction of layered materials, obtained by explosion welding). Svarka i rodstvennye tekhnologii: Minsk, Respublikanskiy mezhvedomstvennyy sbornik nauchnykh trudov (Welding and related technologies: Minsk, Republican interdepartmental collection of scientific proceedings). 1999. Iss. 2. pp. 50–52.
11. Liu Y., Suslov S., Han Q., Xu C., Hua L. Microstructure of the pure copper produced by upsetting with ultrasonic vibration. Materials Letters. 2012. No. 67(1). pp. 52–55.
12. Litvinov V. V., Kuzmin V. I., Lysak V. I., Strokov O. V., Kuzmin A. S. Osobennosti svarki vzryvom tolstolistovykh stalealyuminievykh kompozitov (Peculiarities of explosion welding of thick sheet steelaluminium composites). Izvestiya Volgogradskogo gosudarstvennogo tekhnicheskogo universiteta = Proceedings of Volgograd State Technical University. 2010. pp. 44–49.