Browsing by Author "Kokarda, Vladimír"

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    Porovnanie charakteristík tvárniteľnosti vysokopevných dvojfázových ocelí skúškou ťahom a LDH skúškou
    (University of Žilina, 2023) Tomáš, Miroslav; Kulya, Juliy Martyn; Kokarda, Vladimír; Evin, Emil
    The paper deals with the issue of formability evaluation of high-strength dual phase steels DP800 and DP1000 with a thickness of 1.6 mm. These steels are used for automotive body deformation zones. The material formability was evaluated by tensile testing with evaluation of mechanical properties, normal anisotropy ratio and strain hardening exponent. The process formability of steels was evaluated by LDH test, which is used for different deformation states modelled by the specimen width. The results of the LDH parameter achieved were correlated with the measured material formability parameters.
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    Porovnanie deformačných charakteristík vysokopevných ocelí používaných v automotive
    (Žilinská univerzita v Žiline, 2023) Evin, Emil; Tomáš, Miroslav; Kokarda, Vladimír; Kulya, Juliy Martyn
    The goal of the research was to compare the deformation properties such as absorption capacity, resistance to deformation, stiffness of high-strength steels with the properties of microalloyed steel based on the results of the tensile test and the three-point bending test. HTC 590X dual-phase steel and RAK 40/70 steel have the potential to reduce intrusion into the passenger compartment, as the maximum deformation resistance, stiffness and energy absorbed in the three-point bending test were greater compared to H220PD microalloy steel reinforcement.