Now showing items 21-30 of 30

  • Determining Johnson-Cook Constitutive Equation for Low-Carbon Steel via Taylor Anvil Test 

    Kunčická, Lenka; Jopek, Miroslav; Kocich, Radim; Dvořák, Karel (MDPI, 2021-08-25)
    Tristal steel is low-carbon construction-type steel widely used in the automotive industry, e.g., for braking components. Given the contemporary demands on the high-volume production of such components, these are typically ...
  • The Influence of Hot-Dip Galvanizing on the Mechanical Properties of High Strength Steels 

    Šmak, Milan; Kubíček, Jaroslav; Kala, Jiří; Podaný, Kamil; Vaněrek, Jan (MDPI, 2021-09-10)
    Modern high-strength steels achieve their strength exclusively through the manufacturing process. Typically, hot-dip galvanizing is used to form a protective zinc layer on the steel parts of structures; nonetheless, the ...
  • Determination of Carbon Steel Dynamic Properties 

    Jopek, Miroslav (Jan Evangelista Purkyne University in Usti nad Labem, 2021-09-18)
    Taylor anvil test is one of the dynamic test method in which we can determine the dependences of strain, strain rate, temperature on flow stress. With this method, we can determine in each cross sec-tion or along axial ...
  • Possibilities of Porosity Repairs after Aluminium Alloys Welding 

    Sigmund, Marian (Jan Evangelista Purkyne University in Usti nad Labem, 2021-09-18)
    This article describes problems of porosity which are caused after welding of aluminium alloys. The main part of this article is dedicated of methods of correction of porosities. The best correction is by welding or by ...
  • Decalcification resistance of various alkaliactivated materials 

    Hrubý, Petr; Bílek, Vlastimil; Topolář, Libor; Kalina, Lukáš; Marko, Michal; Šoukal, František; Dvořák, Richard; Herčík, Tomáš (IOP Publishing, 2021-09-29)
    The resistance of alkali-activated materials (AAMs) to degradation processes, particularly the decalcification, was studied in this paper. The ground granulated blast furnace slag was alkali-activated using various activators ...
  • Improving Rotary Draw Bending Process by Changing a Geometry of the Pressure Die 

    Řiháček, Jan; Peterková, Eva; Císařová, Michaela (Jan Evangelista Purkyne University in Usti nad Labem, 2021-10-01)
    The paper is focused on an analysis and optimization of the rotary draw bending process to eliminate bent tube ovality by modification of the pressure die geometry. The bending process is realized on Wafios CNC bending ...
  • Vertical Graphene Growth on AlCu4Mg Alloy by PECVD Technique 

    Polzer, Aleš; Sedlák, Josef; Sedláček, Jan; Beneš, Libor; Mouralová, Kateřina (MDPI, 2021-10-02)
    Vertical graphene, which belongs to nanomaterials, is a very promising tool for improving the useful properties of long-used and proven materials. Since the growth of vertical graphene is different on each base material ...
  • Heterogenous Weld of Heat Resistant Steel With Cobalt Alloy 

    Sigmund, Marian (Manufacturing Technology, 2021-10-22)
    The article describes problems of welding heterogeneous welds be specific of heat resistant steel X15CrNiSi20-25 with cobalt alloy Stellite 6. Heterogeneous welds are produced by GTAW (141 according to standard EN ISO 4063) ...
  • Influence of Sub Structure Development within Rotary Swaged Al–Cu Clad Conductors on Skin Effect during Transfer of Alternating Current 

    Kunčická, Lenka; Kocich, Radim; Kačor, Petr; Jambor, Michal; Jopek, Miroslav (MDPI, 2022-01-15)
    The nature of alternating current transfer via metallic materials is specific, since the current density tends to be inhomogeneous across the cross-section of the conductor and the skin effect tends to occur. However, the ...
  • Application of Carbon–Flax Hybrid Composite in High Performance Electric Personal Watercraft 

    Zouhar, Jan; Slaný, Martin; Sedlák, Josef; Joska, Zdeněk; Pokorný, Zdeněk; Barényi, Igor; Majerík, Jozef; Fiala, Zdeněk (MDPI, 2022-04-26)
    Within the herein presented research, we studied the applicability of flax fabrics for composite parts in personal watercrafts in order to enhance damping of vibrations from the engine and noise reduction (which is relatively ...