TY - GEN A1 - Vogel, J. A1 - Keller, J. A1 - Sviridov, Alexander A1 - Feige, H.-J. A1 - Kreyssig, K. A1 - Auersperg, J. A1 - Plass, P. A1 - Walter, H. T1 - Characterisation of Strength Behavior of Aluminium Foam Sandwiches Under Static Load T2 - Strain : an international journal for experimental mechanics N2 - Cellular metals, particularly aluminium foams, are increasingly used in automotive, railcar and aircraft industries due to their advantages such as low density, comparatively high stiffness, noise damping or non-flammability. From this point of view a new powder-compact forming and foaming technique has been developed to manufacture 3D-aluminium foam sandwich (AFS) parts for components of railcars without glued joint between the foamed core layer and both cover sheets. Three different stages of foam expansion have been analysed to describe the material properties. We have characterised samples made of plane AFS panels by compression, bending and shear tests. The shear strain is optically measured by digital image correlation to estimate the shear modulus of foamed sandwiches. Furthermore, these experimentally determined values and curves are the basis for the verification and optimisation of finite element models by design of experiments. As a result of this work, recommendations could be derived for improving technological parameters. KW - aluminium foam sandwich KW - bending and shear test KW - mechanical properties Y1 - 2011 U6 - https://doi.org/10.1111/j.1475-1305.2008.00522.x SN - 0039-2103 VL - 47 IS - Suppl. 1 SP - e234 EP - e242 ER - TY - GEN A1 - Sizova, Irina A1 - Sviridov, Alexander A1 - Bambach, Markus T1 - Avoiding crack nucleation and propagation during upset bulging of tubes T2 - International Journal of Material Forming KW - Tube forming KW - Failure KW - Mechanical Joining KW - Finite Element Simulation Y1 - 2017 U6 - https://doi.org/10.1007/s12289-016-1292-9 SN - 1960-6214 VL - 10 IS - 3 SP - 443 EP - 451 ER - TY - GEN A1 - Sviridov, Alexander A1 - Grützner, Philip A1 - Rusch, Michael A1 - Bambach, Markus T1 - Joining by upset bulging - Tooling design and new concepts for online process control using servo presses and local heating T2 - Journal of Machine Engineering KW - tube forming KW - mechanical joining KW - servo press KW - upset bulging KW - local heating Y1 - 2017 SN - 1895-7595 SN - 1642-6568 VL - 17 IS - 1 SP - 78 EP - 87 ER - TY - GEN A1 - Doncheva Bambach, Margarita A1 - Bambach, Markus A1 - Sviridov, Alexander A1 - Weiß, Sabine T1 - New process chains involving additive manufacturing and metal forming - a chance for saving energy? T2 - Procedia Engineering KW - additive manufacturing KW - laser deposition welding KW - aluminium KW - energy consumption Y1 - 2017 U6 - https://doi.org/10.1016/j.proeng.2017.10.1049 SN - 1877-7058 N1 - International Conference on the Technology of Plasticity, ICTP 2017, 17-22 September 2017, Cambridge, United Kingdom VL - 207 SP - 1176 EP - 1181 ER - TY - GEN A1 - Sviridov, Alexander A1 - Rusch, Michael A1 - Almohallami, Amer A1 - Bonk, Christian A1 - Bouguecha, Anas A1 - Bambach, Markus A1 - Behrens, Bernd-Arno T1 - Creating load-adapted mechanical joints between tubes and sheets by controlling the material flow under plastically unstable tube upsetting T2 - Procedia Engineering KW - tube forming KW - mechanical joining KW - upset bulging KW - shape optimization Y1 - 2017 U6 - https://doi.org/10.1016/j.proeng.2017.10.860 SN - 1877-7058 N1 - International Conference on the Technology of Plasticity, ICTP 2017, 17-22 September 2017, Cambridge, United Kingdom VL - 207 SP - 968 EP - 973 ER - TY - GEN A1 - Bambach, Markus A1 - Sizova, Irina A1 - Sviridov, Alexander A1 - Stendal, Johan Andreas A1 - Günther, Martin T1 - Batch Processing in Preassembled Die Sets - A New Process Design for Isothermal Forging of Titanium Aluminides T2 - Journal of Manufacturing and Materials Processing Y1 - 2018 U6 - https://doi.org/doi:10.3390/jmmp2010001 SN - 2504-4494 VL - 2 IS - 1 ER - TY - GEN A1 - Sizova, Irina A1 - Sviridov, Alexander A1 - Bambach, Markus A1 - Eisentraut, Mark A1 - Hemes, Susanne A1 - Hecht, Ulrike A1 - Marquardt, Axel A1 - Leyens, Christoph T1 - A study on hot-working as alternative post-processing method for titanium aluminides built by laser powder bed fusion and electron beam melting T2 - Journal of Materials Processing Technology Y1 - 2021 U6 - https://doi.org/10.1016/j.jmatprotec.2020.117024 SN - 0924-0136 SN - 1873-4774 VL - 291 ER - TY - GEN A1 - Bambach, Markus A1 - Ünsal, Ismail A1 - Sviridov, Alexander A1 - Hama-Saleh, Rebar A1 - Weisheit, Andreas T1 - Hybrid manufacturing of sheet metals and functionalizing for joining applications via hole flanging T2 - Production Engineering KW - Hybrid manufacturing KW - Laser metal deposition KW - Lightweight design KW - Hole flanging Y1 - 2021 U6 - https://doi.org/10.1007/s11740-020-01016-0 SN - 0944-6524 SN - 1863-7353 VL - 15 IS - 2 SP - 223 EP - 233 ER - TY - GEN A1 - Alimov, Artem A1 - Sviridov, Alexander A1 - Sydow, Benjamin A1 - Jensch, Felix A1 - Härtel, Sebastian T1 - Additive Manufacturing of Hot-Forming Dies Using Laser Powder Bed Fusion and Wire Arc Direct Energy Deposition Technologies T2 - Metals N2 - Additive technologies are now widely used for the production of complex precise parts and have high potential for the production of forming dies. In this work, hot-forming dies optimized for additive manufacturing were developed and produced with wire arc direct energy deposition (WA-DED) and laser powder bed fusion (L-PBF) technologies. The concept of lightweight hot-forming dies with a 2D-lattice structure was developed, which reduced the weight of each die by 56%, from 14.2 kg to 6.1 kg, in production using L-PBF. Maraging/precipitation-hardened steel 17-4PH was used as an alternative to traditional hot-working steels with slightly lower mechanical properties and a much higher processability in the additive manufacturing process. The workability of the manufactured dies was confirmed by forging tests on an industrial screw press. KW - additive manufacturing KW - hot-forming dies KW - L-PBF KW - WA-DED KW - WAAM Y1 - 2023 UR - https://www.mdpi.com/2075-4701/13/11/1842 U6 - https://doi.org/10.3390/met13111842 SN - 2075-4701 VL - 13 IS - 11 ER - TY - GEN A1 - Jensch, Felix A1 - Sviridov, Alexander A1 - Dubinin, Sergej A1 - Karabulut, Fatih A1 - Weiß, Sabine A1 - Härtel, Sebastian T1 - Parameter optimization for low-porosity Ti-6Al-4V parts produced using accelerated PBF-LB process T2 - Progress in additive manufacturing N2 - In this study, the influence of various process parameters on the porosity of Ti-6Al-4V parts fabricated via Powder Bed Fusion – Laser Based (PBF-LB) is investigated. Three different layer thicknesses (30 μm, 60 μm, and 120 μm) were analyzed to define process windows enabling a build-rate acceleration while keeping the porosity below 0.1%. Through iterative parameter refinement, the effects of laser power, scan speed and hatch distance were examined in terms of linear energy density (LED), energy transmission density (ETD) and volumetric energy density (VED), and their influence on the formation of process-related defects such as pores. Correlations between these energy metrics and pore formation types (keyhole vs. lack-of-fusion) are discussed. The results demonstrate that process acceleration by a factor of more than 3 is possible while maintaining high quality of the components in terms of internal porosity. In addition, an accelerated method for manufacturing components using the PBF-LB process is presented, in which components are manufactured at very high build-rates but with increased porosity and then brought to the target porosity of 0.1% using the HIP process. This has made it possible to accelerate the build-rate in PBF-LB production by a further 32%. Accounting for the additional time required for HIP, the HIP route is faster than using the accelerated, which achieves the target porosity in as-built condition, for parts larger than 1421 cm3. KW - Laser powder bed fusion KW - Process parameter optimization KW - Porosity analysis KW - Ti-6Al-4V KW - Additive manufacturing productivity Y1 - 2026 U6 - https://doi.org/10.1007/s40964-025-01510-w SN - 2363-9520 SP - 1 EP - 17 PB - Springer CY - Cham ER -