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S. V. Gladkovsky, S. V. Kuteneva, I. S. Kamantsev, R. M. Galeev, D. А. Dvoynikov

FORMATION OF THE MECHANICAL PROPERTIES AND FRACTURE RESISTANCE CHARACTERISTICS OF SANDWICH COMPOSITES BASED ON THE 09G2S STEEL AND THE EP678 HIGH-STRENGTH STEEL OF VARIOUS DISPERSION

The structure, mechanical properties and impact strength of 5-layered composites based on maraging and low-alloy mild steels are investigated. The effect of subsequent heat treatment on the microstructure and mechanical properties of layered composites is studied. The contribution of the presence of the initial ultrafine-grained microstructure of maraging steel to the formation of the mechanical properties of explosion-welded and thermally strengthened layered composites is evaluated.

Acknowledgements: The work was partially supported by the project of UB RAS No. 15-15-1-52 (the "Arctic" program) in terms of studying the characteristics of impact strength and dynamic crack resistance at room and low temperatures, within the framework of the RFBR grant No. 16-38-00723mol_a in the part of the study cyclic crack resistance of layered composites, and within the framework of the State Order No. 01201375904 in the part of studying the microstructure of individual layers of composites and the structure of interlayer boundaries.

Keywords: layered composite, explosion welding, low-alloy mild steel, maraging steel, microstructure, mechanical properties, brittle fracture resistance characteristics

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Chief Editor:  E.S. Gorkunov
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