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 - TY - GEN A1 - Kondratyev, Alex A1 - Morozova, Iuliia A1 - Golubev, Iurii A1 - Hantelmann, Cord A1 - Naumov, Alexander A1 - Michailov, Vesselin T1 - Микроструктура и механические свойства швов после различных режимов импульсной сварки Al – Mg – Si сплавов трением с перемешиванием T1 - Untersuchung von Mikrostruktur und mechanischen Eigenschaften der Al-Mg-Si Legierungen beim Impuls-Rührreibschweißen mit unterschiedlichen Schweißparametern T2 - Metallovedenie i termicheskaya obrabotka metallov N2 - Welded joints of aluminum alloy 6082-T6 formed by the method of pulse friction stir welding are studied. The effect of the power and frequency of the pulses on the microstructure and mechanical properties of the welded joints is determined. Application of an additional pulse during the welding affects the surface quality and the shape of the weld, the distribution of the oxide layer and of particles of the hardening phase, and the grain size in the zone of dynamic recrystallization. KW - pulse friction stir welding KW - power and frequency of pulses KW - microstructure KW - mechanical properties KW - Al – Mg – Si alloy Y1 - 2017 SN - 0026-0819 IS - 11 SP - 25 EP - 30 ER - TY - GEN A1 - Kondrat’ev, Sergey A1 - Morozova, Iuliia A1 - Golubev, Iurii A1 - Hantelmann, Cord A1 - Naumov, Alexander A1 - Michailov, Vesselin T1 - Microstructure and Mechanical Properties of Welds of Al – Mg – Si Alloys After Different Modes of Impulse Friction Stir Welding T2 - Metal Science and Heat Treatment N2 - Welded joints of aluminum alloy 6082-T6 formed by the method of impulse friction stir welding are studied. The effect of the power and frequency of the pulses on the microstructure and mechanical properties of the welded joints is determined. Application of an additional pulse during the welding affects the surface quality and the shape of the weld, the distribution of the oxide layer and of particles of the hardening phase, and the grain size in the zone of dynamic recrystallization. KW - impulse friction stir welding KW - power and frequency of pulses KW - microstructure KW - mechanical properties KW - Al – Mg – Si alloy Y1 - 2018 UR - https://link.springer.com/article/10.1007%2Fs11041-018-0213-6 U6 - https://doi.org/10.1007/s11041-018-0213-6 SN - 0026-0673 VL - 59 IS - 11-12 SP - 697 EP - 702 ER - TY - GEN A1 - Naumov, Anton A1 - Isupov, Fedor A1 - Golubev, Iurii A1 - Morozova, Iuliia A1 - Spree, Cornelius T1 - Development of Methodology to Determine the Temperature Influence on Microstructure Evolution during Friction Stir Welding T2 - Papers from Materials Science and Technology 2018 (MS&T18), October 14–18, 2018, Greater Columbus Convention Center, Columbus, Ohio, USA Y1 - 2018 UR - https://www.researchgate.net/publication/328772948_DEVELOPMENT_OF_METHODOLOGY_TO_DETERMINE_THE_TEMPERATURE_INFLUENCE_ON_MICROSTRUCTURE_EVOLUTION_DURING_FRICTION_STIR_WELDING U6 - https://doi.org/10.7449/2018mst/2018/mst_2018_795_802 ER - TY - GEN A1 - Morozova, Iuliia A1 - Obrosov, Aleksei A1 - Naumov, Anton A1 - Królicka, Aleksandra A1 - Golubev, Iurii A1 - Bokov, Dmitry O. A1 - Doynov, Nikolay A1 - Weiß, Sabine A1 - Michailov, Vesselin T1 - Impact of Impulses on Microstructural Evolution and Mechanical Performance of Al-Mg-Si Alloy Joined by Impulse Friction Stir Welding T2 - Materials N2 - Impulse Friction Stir Welding (IFSW) was utilized to join 6082–T6 alloy plates at various impulse frequencies. A distinctive feature of IFSW is the generation of mechanical impulses that enhances the forging action of the tool, and thereby, alters the weld microstructure. The microstructural evolution in the Stir Zone (SZ) with special focus on the strengthening precipitation behavior, and overall mechanical properties of the IFSW joints have been investigated. It was demonstrated that the strengthening β″ precipitates reprecipitated in the SZ of the IFSW joints during natural aging. In contrast, no precipitates were found in the SZ of the Friction Stir Welding (FSW) weld. Partial reversion of β″ after IFSW is supposed to occur due to more developed subgrain network and higher dislocation density introduced by impulses that accelerated precipitation kinetics. Dynamic recrystallisation was facilitated by impulses resulting in a fine, homogeneous structure. There was no significant difference between the microhardness in the SZ, tensile and yield strength of the FSW and IFSW joints. However, the application of impulses demonstrated the smoothing of the hardness reduction in the transition region at the advancing side. The shift of the fracture location from the Heat-Affected Zone (HAZ) by FSW to the SZ as well as higher elongation of the joints by IFSW of lower frequencies could be related to the grain refinement and the change of the grain orientation. KW - Al-Mg-Si alloy KW - impulse friction stir welding (IFSW) KW - precipitation KW - microstructure evolution KW - mechanical properties Y1 - 2021 UR - https://www.mdpi.com/1996-1944/14/2/347/htm U6 - https://doi.org/https://doi.org/10.3390/ma14020347 SN - 1996-1944 VL - 14 IS - 2 ER - TY - GEN A1 - Morozova, Iuliia A1 - Kehm, Christian A1 - Obrosov, Aleksei A1 - Yang, Yitong A1 - Miah, Kamal Uddin Mohammad A1 - Uludintceva, Elena A1 - Fritzsche, Sebastian A1 - Weiß, Sabine A1 - Michailov, Vesselin T1 - On the Heat Treatment of Selective-Laser-Melted 316L T2 - Journal of Materials Engineering and Performance N2 - The effect of heat treatment at various temperatures (650, 850, 1050, and 1100°C) and dwell times (10 min and 1 h) on the metallurgical and microstructural evolution as well as on the related tensile properties of stainless steel 316L processed by selective laser melting (SLM) has been systematically evaluated. The metallurgical and microstructural features such as defects, stability of the columnar–cellular structure and substructure, second phase particles, and phase transformation imparted by SLM and heat treatment have been discussed. It has been shown that the processing conditions specific to SLM significantly alter the kinetics of phase evolution compared to standard welding techniques which affects the accuracy of the prediction. The influence of these characteristics on tensile properties and hardness was elucidated. It was disclosed that with increasing heat treatment temperature there was a gradual increase in elongation but a decrease in strength related to the dislocation density and the development of the microstructure. KW - 316L KW - grain structure KW - phase evolution KW - SLM KW - tensile properties Y1 - 2023 U6 - https://doi.org/10.1007/s11665-022-07404-0 SN - 1544-1024 VL - 32 (2023) IS - 10 SP - 4295 EP - 4305 ER - TY - GEN A1 - Morozova, Iuliia A1 - Królicka, Aleksandra A1 - Obrosov, Aleksei A1 - Yang, Yitong A1 - Doynov, Nikolay A1 - Weiß, Sabine A1 - Michailov, Vesselin T1 - Precipitation phenomena in impulse friction stir welded 2024 aluminium alloy T2 - Materials Science and Engineering: A N2 - Microhardness variations across the friction stir welded (FSW) and impulse friction stir welded (IFSW) AA2024–T351 joints have been elucidated by the transformations of the S–Al2CuMg phase with a special focus on a distinguished hardness peak within the heat-affected zone (HAZ) of the impulse welds. The increase in hardness within the stir zone (SZ) originated from the partial re-precipitation of the initial Guinier-Preston-Bagaryatsky zones (GPB) and metastable S needles, previously dissolved.) Formation and growth of stable S precipitates via coalescence accounted for the softening through the thermo-mechanically affected zone (TMAZ). The peak strengthening within the HAZ of the IFSW joints was mainly caused by the dense needle-shaped S particles, which can be explained by a mutual influence of the process specific temperature and strain cycles. Dislocations and subgrain boundaries introduced to the material due to plastic deformation facilitated the nucleation of strengthening S precipitates in the HAZ. It demonstrates that the impact of deformation should be considered by the characterization of the precipitation development in the HAZ. KW - AA2024 KW - impulse friction stir welding KW - microhardness KW - s precipitation KW - thermal cycle KW - deformation Y1 - 2022 U6 - https://doi.org/10.1016/j.msea.2022.143617 SN - 0921-5093 SP - 1 EP - 11 ER - TY - CHAP A1 - Ginzburg, Svetlana A1 - Morozova, Iuliia A1 - Kloshek, Alexander A1 - Ossenbrink, Ralf A1 - Michailov, Vesselin T1 - Schweißen von Stahl mit Nanopartikel modifizierten Fülldrähten - Schweißnahtgefüge und -eigenschaften T2 - DVS Congress 2018 : Große Schweißtechnische Tagung, DVS-Studentenkongress, Vorträge der Veranstaltungen in Friedrichshafen am 17. und 18. September 2018 N2 - Analyse des Schweißnahtgefüges und -eigenschaften beim Schweißen von Stahl mit Nanopartikel modifizierten Fülldrähten KW - Schweißen KW - Fülldraht KW - Nano KW - Nanotechnologie KW - Stahl KW - Gefüge Y1 - 2018 SN - 978-3-96144-036-8 SP - 40 EP - 46 PB - DVS Media GmbH CY - Düsseldorf ER - TY - GEN A1 - Saoudi, Adel A1 - Fellah, Mamoun A1 - Hezil, Naouel A1 - Lerari, Djahida A1 - Khamouli, Farida A1 - Atoui, L'hadi A1 - Bachari, Khaldoun A1 - Morozova, Iuliia A1 - Obrosov, Aleksei A1 - Samad, Mohammed Abdul T1 - Prediction of mechanical properties of welded steel X70 pipeline using neural network modelling T2 - International Journal of Pressure Vessels and Piping N2 - An artificial neural network (ANN) model was developed to predict tensile and impact properties of a submerged arc helical welded (SAHW) pipeline steel API X70 based upon its chemical composition. Weight percent of the elements was considered as the input, while the tensile and Charpy impact properties were considered as the outputs. Scatter diagrams and two statistical parameters (absolute fraction of variance and relative error) were used to evaluate the prediction performance of the developed artificial neural network model. The predicted values were found to be in excellent agreement with the experimental data and the current model has a good learning precision and generalization (for training, validation and testing data sets). The results revealed that the developed model is very accurate and has a strong potential for capturing the interaction between the mechanical properties and chemical composition of welded high strength low alloy (HSLA) steels. KW - API X70 KW - Artificial neural network (ANN) KW - Submerged arc welding KW - Modeling KW - Mechanical properties KW - Chemical composition Y1 - 2020 U6 - https://doi.org/10.1016/j.ijpvp.2020.104153 SN - 0308-0161 VL - 186 ER - TY - GEN A1 - Obrosov, Aleksei A1 - Rylkov, Evgenii A1 - Morozova, Iuliia A1 - Naumov, Anton T1 - НАНЕСЕНИЕ ИЗНОСОСТОЙСКИХ ПОКРЫТИЙ НА ИНСТРУМЕНТЫ ДЛЯ СВАРКИ ТРЕНИЕМ С ПЕРЕМЕШИВАНИЕМ МЕТОДОМ МАГНЕТРОННОГО РАСПЫЛЕНИЯ T2 - International Scientific Conference Modern materials and advanced manufacturing technology (MMAMT-2021) KW - PVD KW - FSW tools KW - Welding Y1 - 2021 UR - http://smppt.spbstu.ru/ UR - http://nanoplatform.by/rss/1701-international-scientific-conference-modern-materials-and-advanced-manufacturing-technology-mmamt-2021.html SP - 169 EP - 170 ER - TY - GEN A1 - Naumov, Anton A1 - Morozova, Iuliia A1 - Rylkov, Evgenii A1 - Obrosov, Aleksei A1 - Isupov, Fedor A1 - Michailov, Vesselin A1 - Rudskoy, Andrey I. T1 - Metallurgical and Mechanical Characterization of High-Speed Friction Stir Welded AA 6082-T6 Aluminum Alloy T2 - Materials N2 - The objective of this study was to investigate the effect of the high welding speed on the mechanical properties and their relations to microstructural characteristics of butt friction stir welded joints with the use of 6082-T6 aluminum alloy. The aluminum sheets of 2.0 mm thick were friction stir welded at low (conventional FSW) and high welding speeds (HSFSW) of 200 and 2500 mm/min, respectively. The grain size in the nugget zone (NZ) was decreased; the width of the softened region was narrowed down as well as the lowest microhardness value located in the heat-affected zone (HAZ) was enhanced by HSFSW. The increasing welding speed resulted in the higher ultimate tensile strength and lower elongation, but it had a slight influence on the yield strength. The differences in mechanical properties were explained by analysis of microstructural changes and tensile fracture surfaces of the welded joints, supported by the results of the numerical simulation of the temperature distribution and material flow. The fracture of the conventional FSW joint occurred in the HAZ, the weakest weld region, while all HSFSW joints raptured in the NZ. This demonstrated that both structural characteristics and microhardness distribution influenced the actual fracture locations. KW - high-speed friction stir welding (HSFSW) KW - aluminum alloy KW - remnant oxide line (ROL) KW - microstructural characteristics KW - mechanical properties KW - fracture behavior KW - FEM Y1 - 2019 UR - https://www.mdpi.com/1996-1944/12/24/4211 U6 - https://doi.org/10.3390/ma12244211 SN - 1996-1944 VL - 12 IS - 24 ER - TY - CHAP A1 - Golubev, Iurii A1 - Morozova, Iuliia A1 - Naumov, Anton A1 - Hantelmann, Cord A1 - Doynov, Nikolay A1 - Michailov, Vesselin T1 - Numerical simulation and experimental investigation on Numerical simulation of 6082-T6 aluminum alloy T2 - Materials Science and Technology 2017, (MS&T17), Pittsburgh, Pennsylvania, USA, October 8-12, 2017, volume 2 N2 - The series of impulse friction stir welding (IFSW) experiments for aluminum alloy 6082-T6 butt joints was performed to obtain micrographs, tensile and hardness test samples and to receive the validation data for a numerical model of the process. Impulse force and frequency were varied to determine the effect of individual process parameters on microstructure evolution and mechanical properties of the welded butt joints. A three-dimensional model was established to simulate temperature distribution, heat generation and contact state between the tool and the workpiece during IFSW. Based on the numerical simulation, the influence of the impulses on heat input, maximum weld temperatures and contact state was found. The combination of impulse force and frequency effected the grain refinement. The influence of impulses on the elongation and hardness of the welded joints during IFSW were determined. KW - Aluminum alloy KW - Numerical simulation Y1 - 2017 SN - 978-1-5108-5058-3 SP - 987 EP - 994 PB - Curran Associates, Inc. CY - Red Hook, NY ER - TY - GEN A1 - Kaneneks, Michael A1 - Kloshek, Alexander A1 - Morozova, Iuliia A1 - Ossenbrink, Ralf A1 - Michailov, Vesselin A1 - Sembol, Ronny T1 - WAAM eines Zwischenstücks für die Bergbauausrüstung T2 - DVS Bericht 2021 N2 - Die lichtbogenbasierte additive Fertigung (WAAM) ist ein vielversprechendes Werkzeug, um die Ersatzteilbereitstellung von schwer verfügbaren oder aufwendig herstellbaren Einzelkomponenten in kürzester Zeit zu gewährleisten. Die Straffung innerbetrieblicher Abläufe sowie die Minimierung von Herstellungs- und Lagerkosten sind eine direkte Folge. Vor dem Einsatz im Betrieb muss sichergestellt werden, dass die Bauteile fehlerfrei additiv herstellbar sind und die mechanischen Eigenschaften den Anforderungen konventionell gefertigter Werkstücke entsprechen. Ein solcher Nachweis konnte am Beispiel eines additiv hergestellten Zwischenstücks für die Bergbauausrüstung mit einer abschließenden Charakterisierung der Werkstoffeigenschaften erfolgreich geführt werden. Das Zwischenstück mit einem Gewicht von ca. 31 kg zur Verbindung von geometrisch unterschiedlichen Profilen wurde ausgehend von einer Grundplatte aus S355-J2+N beidseitig additiv mit einem Massivdraht G3Si1 aufgebaut. Die Ermittlung geeigneter Parameter, Schweißfolgen und Zwischenlagentemperaturen erfolgte experimentell mit begleitenden metallografischen Untersuchungen. Nach erfolgreicher Fertigung wurden die mechanischen Eigenschaften des Zwischenstücks bestimmt sowie die Festigkeit und Zähigkeit mit den geforderten Werkstoffkennwerten des bisher eingesetzten konventionellen Konstruktionsmaterials verglichen. KW - Schweißtechnik KW - WAAM KW - Wire Arc Additiv Manufacturing KW - Additive Fertigung KW - Lichtbogenauftragschweißen Y1 - 2021 UR - https://www.dvs-ev.de/call4papers/abstract.cfm?vid=109&pid=7030 SN - 978-3-96144-147-1 VL - 2021 SP - 315 EP - 323 PB - DVS Media GmbH CY - Düsseldorf ER - TY - GEN A1 - Morozova, Iuliia A1 - Bonnel, Jean-Marie A1 - Rosert, Reinhard A1 - Ossenbrink, Ralf A1 - Michailov, Vesselin T1 - Einfluss der Schweißposition beim MSG-Fülldrahtschweißen auf die Kerbschlagzähigkeit von hoch- und niedriglegierten Stählen T2 - DVS Congress 2019Große Schweißtechnische Tagung : DVS-Studentenkongress : Vorträge der Veranstaltungen in Düsseldorf vom 16. bis 17. September 2019 N2 - Die Schweißposition beeinflusst erheblich die mechanischen Eigenschaften der Schweißnaht, insbesondere die Kerbschlagzähigkeit. Dies zeigt ein umfassender Vergleich der mechanischen Eigenschaften von Schweißgütern, die in der Steigposition (PF) und Wannenlage (PA) ausgeführt wurden. Schweißgüter von Kohlenstoff-Mangan-Stählen weisen in der PF-Position eine reduzierte Kerbschlagarbeit im Vergleich zur PA-Position auf. Dagegen ist bei austenitischen und Duplexstählen der Einfluss der Schweißposition auf die Kerbschlagarbeit genau entgegengesetzt. Der Vortrag fasst den Einfluss der Schweißpositionen auf die mechanischen Eigenschaften zusammen und liefert eine Erklärung für die gegensätzlichen Auswirkungen auf die Kerbschlagzähigkeit der Schweißgüter. Der Schwerpunkt liegt dabei auf hochlegierten Fülldrähten mit einer schnell erstarrenden Schlacke. Die Schlackeneigenschaften, Schweißgutmikrostruktur, Delta-Ferrit-Gehalte für Schweißgüter vom Typ Duplexstahl (2209) und von austenitischen Schweißgütern (308L) sowie die Auswirkungen der Schweißposition auf die Richtung des Schweißkornwachstums werden erläutert. Zum Vergleich werden Kohlenstoff-Mangan-Rutil-Fülldrähte mit schnell erstarrender Schlacke herangezogen. Y1 - 2019 UR - https://www.gbv.de/dms/tib-ub-hannover/1067034390.pdf SN - 978-3-96144-066-5 SP - 310 EP - 318 PB - DVS Media GmbH CY - Düsseldorf ER - TY - GEN A1 - Naumov, Anton A1 - Morozova, Iuliia A1 - Isupov, Fedor A1 - Golubev, Iurii A1 - Michailov, Vesselin T1 - Temperature Influence on Microstructure and Properties Evolution of Friction Stir Welded Al-Mg-Si Alloy T2 - Key Engineering Materials N2 - The temperature influence on the microstructure evolution and microhardness of the agehardenable aluminium alloy 6082 T6 during friction stir welding was defined. In order to achieve this aim, the thermocycles calculated using the developed 3D Finite Element Model were physically simulated on the Gleeble-3800 in the points which located in the different zones of the weld. The microstructure in the chosen points after Gleeble testing was investigated as well as the microhardness was measured. The results were consequently compared with the relevant results obtained after friction stir welding. It was shown that the microstructure and microhardness profile are influenced not only by temperature but by deformation. The increase in hardness in different zones after FSW compared to Gleeble testing can be explained by the grain refinement in the nugget zone as well as the hardening precipitate distribution along the weld which can occur more rapidly due to the deformation influence. Y1 - 2019 U6 - https://doi.org/10.4028/www.scientific.net/KEM.822.122 SN - 1662-9795 VL - 822 SP - 122 EP - 128 ER - TY - GEN A1 - Naumov, Anton A1 - Isupov, Fedor A1 - Golubev, Iurii A1 - Morozova, Iuliia T1 - Effect of the temperature of friction stir welding on the microstructure and mechanical properties of welded joints of an Al-Cu-Mg alloy T2 - Metal Science and Heat Treatment N2 - Amethod for assessing the effect of the temperature of friction stir welding on the microstructure and mechanical properties of welded joints of aluminum alloy D16AT is suggested. The temperature cycles in different zones of a welded joint are determined by mathematical simulation. The computed temperature cycles are implemented in a Gleeble-3800 system. It is shown that the welding temperature affects little the evolution of the microstructure in different zones of the welded joints of alloy D16AT. Y1 - 2019 U6 - https://doi.org/10.1007/s11041-019-00342-0 SN - 1573-8973 SN - 0026-0673 VL - 60 SP - 695 EP - 700 ER - TY - GEN A1 - Golubev, Iurii A1 - Morozova, Iuliia A1 - Naumov, Anton A1 - Hantelmann, Cord A1 - Doynov, Nikolay A1 - Michailov, Vesselin T1 - Numerical Simulation and Experimental Investigation on Impulse Friction Stir Welding of 6082-T6 Aluminum Alloy T2 - Papers from Materials Science and Technology 2017 (MS&T17), October 8 – 12, 2017, David L. Lawrence Convention Center, Pittsburgh, Pennsylvania USA N2 - The series of impulse friction stir welding (IFSW) experiments for aluminum alloy 6082-T6 butt joints was performed to obtain micrographs, tensile and hardness test samples and to receive the validation data for a numerical model of the process. Impulse force and frequency were varied to determine the effect of individual process parameters on microstructure evolution and mechanical properties of the welded butt joints. A three-dimensional model was established to simulate temperature distribution, heat generation and contact state between the tool and the workpiece during IFSW. Based on the numerical simulation, the influence of the impulses on heat input, maximum weld temperatures and contact state was found. The combination of impulse force and frequency effected the grain refinement. The influence of impulses on the elongation and hardness of the welded joints during IFSW were determined. Y1 - 2017 UR - https://www.researchgate.net/publication/326434324_Numerical_Simulation_and_Experimental_Investigation_on_Impulse_Friction_Stir_Welding_of_6082-T6_Aluminum_Alloy U6 - https://doi.org/10.7449/2017/mst_2017_987_994 SP - 987 EP - 994 ER - TY - GEN A1 - Kotlarski, Georgi A1 - Ormanova, Maria A1 - Nikitin, Alexander A1 - Morozova, Iuliia A1 - Ossenbrink, Ralf A1 - Michailov, Vesselin A1 - Doynov, Nikolay A1 - Valkov, Stefan T1 - Structure Formation and Mechanical Properties of Wire Arc Additively Manufactured Al4043 (AlSi5) Components T2 - Metals N2 - In the current paper, the correlation between the physical size of additively built wire arc specimens and their structure and properties is studied. For the purpose of this work, two oval shaped specimens of different lengths were manufactured under the same technological conditions. The specimens have a length of 200 mm and 400 mm and will be referred to as L200 and L400. The microstructure of the samples was studied using X-ray diffraction analysis (XRD), optical microscopy, and scanning electron microscopy (SEM). The microhardness, yield strength (YS), and ultimate tensile strength (UTS) were determined and their correlation with the technological conditions of specimen build-up was clarified. The results of the carried out experiments indicated that the crystallographic structure of both specimens is similar. The scanning electron microscopy images show a higher concentration of irregularly shaped micro-pores formed near the edge of the αAl grains in the structure of the L400 specimen compared to the L200 one. An increase in the size of the αAl solid solution grains in the case of the L200 specimen towards its top section was noticed using optical microscopy. A slightly lower magnitude change was noticed concerning the L400 specimen. The increase in the size of the aluminum crystals was determined to be the increasing interpass temperature. Due to the much smaller thermal dissipation capacity of the smaller specimen, the interpass temperature of the same increased faster compared to the larger specimen. All of the above-mentioned factors led to a decrease in the microhardness of the specimens at higher stages of build-up. Since the specimens were deposited using similar layer deposition conditions, the resultant YS and UTS data are also highly comparable. KW - structure KW - morphology KW - hardness KW - tensile strength KW - defects formation KW - WAAM KW - AlSi5 KW - Al4043 KW - GMAW KW - cold arc pulse Y1 - 2024 U6 - https://doi.org/10.3390/met14020183 SN - 2075-4701 VL - 14 IS - 2 ER - TY - GEN A1 - Kotlarski, Georgi A1 - Ormanova, Maria A1 - Nikitin, Alexander A1 - Morozova, Iuliia A1 - Ossenbrink, Ralf A1 - Michailov, Vesselin A1 - Doynov, Nikolay A1 - Valkov, Stefan T1 - Microstructural and Mechanical Properties of CAP-WAAM Single-Track Al5356 Specimens of Differing Scale T2 - Materials N2 - The mass production of metallic components requires high agility in the working process conditioned by the necessity of building details of different shapes and sizes. Changing the size of the components theoretically influences the thermal dissipation capability of the same, which could lead to a change in their structure and mechanical properties. This is particularly important when aluminum alloys are concerned. For this reason, two Al5356 single-track specimens were built using the same technological conditions of layer deposition by varying only their geometrical size. In all cases, the specimens were wire and arc additively manufactured (WAAM) using a process based on gas metal arc welding (GMAW) in the cold arc pulse mode (CAP). The structure of both specimens was studied and defects along their surfaces were detected in the form of micro-pores and micro-cracks. A high concentration of undissolved Mg particles was also detected, along with some standalone Si particles. Uniformity in the build-up process was achieved, which led to the formation of nearly identical structures in the specimens. Subsequently, the resultant mechanical properties were also highly comparable. This indicates that the geometry-related variation in thermal conditions has an insignificant influence on the component’s structure and properties. KW - microstructure KW - WAAM KW - cold arc pulse (CAP) KW - AlMg5Cr KW - Al5356 KW - single-track KW - mechanical properties Y1 - 2024 U6 - https://doi.org/10.3390/machines12010072 SN - 2075-1702 VL - 12 IS - 1 ER -