TY - GEN A1 - Bobrynina, E. V. A1 - Larionova, T. V. A1 - Koltsova, Tatiana S. A1 - Ginzburg, S. A. A1 - Michailov, Vesselin T1 - Effect of alumina addition on weld deposits microstructure at the welding of carbon steel T2 - Materials Physics and Mechanics N2 - The formation of acicular ferrite in the structure of weld deposits when welding carbon steels is often associated with the introduction of nonmetallic additives into the electrode material. Fe–alumina composite powders with alumina particles less than 1 µm were used as a filler for cored welding wire and the influence of aluminum oxide additives up to 2,5 wt.% on the structure of the welded seam was studied. It was shown that the addition of aluminum oxide to the welding wire led to the initiation of the formation of intragranular acicular ferrite in the weld deposit and to a more even distribution of hardness through the zones of weld seam. KW - acicular ferrite KW - alumina KW - welding KW - carbon steel Y1 - 2018 U6 - https://doi.org/10.18720/MPM.3812018_4 SN - 1605-8119 VL - Vol. 38 IS - 1 SP - 26 EP - 32 ER - TY - GEN A1 - Koltsova, Tatiana S. A1 - Michailov, Vesselin T1 - Hybrid Composite Materials Aluminum-Carbon Nanostructures T2 - Materials science medziagotyra Y1 - 2015 SN - 1392-1320 SN - 2029–7289 VL - 21 IS - 3 SP - 372 EP - 375 ER - TY - GEN A1 - Koltsova, Tatiana S. A1 - Tolochko, Oleg V. A1 - Michailov, Vesselin T1 - Effect of hot pressing modes on the structure and properties of an aluminum-carbon nanofibers’ composite material T2 - Metal Science and Heat Treatment Y1 - 2015 U6 - https://doi.org/10.1007/s11041-015-9793-6 SN - 0026-0673 SN - 1573-897 VL - 56 IS - 9–10 SP - 525 EP - 530 ER - TY - GEN A1 - Koltsova, Tatiana S. A1 - Shakov, Fedor M. A1 - Voznyakovskiy, A. A. A1 - Lyashkov, A. I. A1 - Tolochko, Oleg V. A1 - Rudskoy, Andrey I. A1 - Nasibulin, Albert G. A1 - Michailov, Vesselin T1 - Fabrication of a Compacted Aluminum-Carbon Nanofiber Material by Hot Pressin T2 - Technical Physics Y1 - 2014 U6 - https://doi.org/10.1134/S1063784214110139 SN - 1063-7842 VL - 59 IS - 11 SP - 1626 EP - 1630 ER - TY - GEN A1 - Ginzburg, Svetlana A1 - Morozova, Iuliia A1 - Kloshek, Alexander A1 - Ossenbrink, Ralf A1 - Michailov, Vesselin A1 - Bobrynina, Elizaveta A1 - Koltsova, Tatiana S. A1 - Tolochko, Oleg V. A1 - Koçak, Mustafa A1 - Ozbek, Sunullah A1 - Morozova, Iuliia T1 - Addition of nanoparticles to flux cored wires for the nucleation of acicular ferrite microstructure in weld metals of the high-strength low-alloy steel T2 - Welding and Cutting N2 - For the reliability of many welded structures like pipelines or offshore wind parks, it is necessary to ensure high mechanical properties such as strength and toughness of the entire material. In order to improve quality of weld joints, flux cored rods and wires containing different nanoparticles (ZrO2, LaB6 and Al2O3) were manufactured and welded with the TIG and MAG welding processes. Influence of these nanoparticles on the microstructure and mechanical properties of the weld joints were investigated. The acicular ferrite and improved strength of the weld metals were observed by the addition of 0.2 wt.% of iron powder with ZrO2 nanoparticles to the filling of flux cored wires. Y1 - 2020 SN - 1612-3433 VL - 19 IS - 1 SP - 48 EP - 53 ER -