Browsing by Author "Grydin, Olexandr"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    Item type:Item,
    Laser Beam Melting of Functionally Graded Materials with Application-Adapted Tailoring of Magnetic and Mechanical Performance
    (Elsevier, 2021) Andreiev, Anatolii; Hoyer, Kay-Peter; Dula, Dimitri; Hengsbach, Florian; Grydin, Olexandr; Frolov, Yaroslav V.; Schaper, Mirko
    ENG: The processing of functionally graded materials (FGMs) using laser beam melting (LBM) is a promising technique for increasing the efficiency of conventional machine components, especially for e-mobility. Therefore, the aim of the current study is to prove the manufacturability of tailored mechanical and magnetic properties in a rotor for an electric motor. For this purpose, the design of additively manufactured rotors with application-adapted tailoring of the properties in the same component using FGM was proposed. The first step was to investigate whether the FGM of the components, i.e. soft-magnetic steel for the rotor core and high-strength steel for the rotor shaft ends, are suitable for machining by LBM. Subsequently, multi-material samples of the two investigated steel types with their different arrangement were processed by LBM. Furthermore, post-processing heat treatments and their effects on the microstructure and resulting magnetic properties as well as the mechanical performance of mono- and multi-material samples were analyzed. The combination of LBM and an additional post heat treatment enables both the formation of a good adhesive bond between the two alloys and the desired tailoring of the properties in the FGMs investigated.
  • Thumbnail Image
    Item type:Item,
    Rocket Engine Vacuum Nozzle 3D Printing: Manufacturing, Weight, and Cost Savings
    (MDPI AG, Basel, Switzerland, 2025) Alexopoulos, Nikolaos D.; Zeimpekis, Vasileios; Vasileiou, Evangelos; Thomaidis, Nikolaos; Souxes, Theodoros; Lazaridou, Ilona; Lutsyk, Maksym; Vorobev, Roman; Karakash, Evgeniy; Karpovich, Elena; Grydin, Olexandr
    ENG: Metallic materials additive manufacturing is extremely challenging nowadays, while aircraft manufacturers are trying to adapt the newly developed technology to produce parts of complex geometry with minimum materials losses. Skyrora is a company focused on the production of several launch vehicles and rockets with the aim of becoming a commercial provider for access to space. One of the Skyrora goals is to develop innovative and long-term solutions for future growth, and, within the Horizon European project “MADE-3D”, aims to improve the rocket propulsion system of the launch vehicle Skyrora XL by exploiting multi-materials during the production phase by additive manufacturing. The main goal of the present investigation is to document the already existing production phases of the “conventional” Skyrora vacuum nozzle printed with Inconel 718 to provide a baseline in terms of weight, manufacturing cost, lead processing time and CO2 equivalent emissions of the under-development multi-material demonstrator.