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Author: Radoslav Vandžura

  • MATERIALS

    Study of age hardened MS1 material after the abrasive water jet application

    • Radoslav Vandžura
    • Vladimír Simkulet
    • Zuzana Mitaľová
    • Matúš Geľatko
    Machines. Technologies. Materials., Vol. 16 (2022), Issue 6, pg(s) 217-220
    • Abstract
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    •  Article PDF

    This contribution deals with the study of cut surface after the abrasive water jet application on the material Maraging Steel MS-1, prepared in the form of 3D printing method Direct Metal Laser Sintering. The aim of the study is to point out the morphology of the cut plane under the use of various technological parameters, like feed rate of machining and abrasive mass flow at the constant cut pressure. For the track morphology monitoring after the abrasive water jet application, scanning electron microscope SEM MIRA 3, f. Tescan, was used. For the identification of observed particles stabbed in the cut track, chemical composition EDX analysis was used.

  • MATERIALS

    Pattern steel: production technology and fracture surface evaluation

    • Adrián Židzik
    • Zuzana Mitaľova
    • František Botko
    • Vladimír Simkulet
    • Juliána Litecká
    • Radoslav Vandžura
    Machines. Technologies. Materials., Vol. 16 (2022), Issue 5, pg(s) 183-185
    • Abstract
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    •  Article PDF

    Presented article deals with the description of the technology of pattern steel production – forging welding, evaluation of fracture surfaces and mechanical tests of examined samples (resulting steel and its individual components). The damascus steel (pattern steel) was prepared by forge welding from a packet consist of a few hundred layers. Marbling was created by folding layers of 2 components: hard and tough steel of different thickness. For evaluation of mechanical properties was applied: Charpy impact test. The evaluation of the fracture surfaces of individual samples was performed by scanning electron microscopy (SEM). The values of mechanical properties of pattern steel themselves are in the range of values of mechanical properties of individual components. The fracture surfaces of the materials have a characteristic relief (in relation to the mechanical properties of the individual components).

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