Recent Submissions

  • Optimizing Friction Stir Welding of Dissimilar Grades of Aluminum Alloy Using WASPAS 

    Rajesh, Pinnavasal Venukrishnan; Gupta, Krishna Kumar; Čep, Robert; Ramachandran, Manickam; Kouřil, Karel; Kalita, Kanak (MDPI, 2022-02-24)
    Aluminum is a widely popular material due to its low cost, low weight, good formability and capability to be machined easily. When a non-metal such as ceramic is added to aluminum alloy, it forms a composite. Metal Matrix ...
  • Successive Grinding and Polishing Effect on the Retained Austenite in the Surface of 42CrMo4 Steel 

    Pechoušek, Jiří; Kuzmann, Ernö; Olina, Anna; Vondrášek, René; Vrba, Vlastimil; Kouřil, Lukáš; Ingr, Tomáš; Král, Petr; Mašláň, Miroslav (MDPI, 2022-01-07)
    Low-alloy 42CrMo4 steels were studied by Fe-57 Mossbauer spectroscopy (MS), X-ray diffractometry (XRD), and Energy Dispersive X-ray Spectroscopy (EDS) measurements. The investigations were performed on metallographic ...
  • Analysis of Surface State after Turning of High Tempered Bearing Steel 

    Čilliková, Mária; Mičietová, Anna; Čep, Robert; Jacková, Martina; Minárik, Peter; Neslušan, Miroslav; Kouřil, Karel (MDPI, 2022-02-24)
    This paper investigates surface state after turning of the high tempered bearing steel 100Cr6 with a hardness of 40 HRC. White layer (WL) thickness and its microhardness, as well as surface roughness, are investigated as ...
  • Characterization of Microstructural Damage and Failure Mechanisms in C45E Structural Steel under Compressive Load 

    Kraišnik, Milija; Čep, Robert; Kouřil, Karel; Baloš, Sebastian; Antić, Aco; Milutinović, Mladomir (MDPI, 2022-03-19)
    In this paper, the microstructural damage evolution of a steel with a ferrite-pearlite microstructure (C45E) was investigated during the process of cold upsetting. The development and the accumulation of microstructural ...
  • Experiments with Forming Coated Sheets with Plasma-Chemical Pretreatment of the Surface 

    Schwarzer, Emil; Dvořák, Milan (Scientific Research Publishing Limited, 2016-06-30)
    The article used new experimental equipment for effective testing of adhesion coatings on the sheets. Testing was performed in jig by bending roller with selected radius. In the context of experiments a multi-jet system ...
  • 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 ...
  • Effect of Higher Silicon Content and Heat Treatment on Structure Evolution and High-Temperature Behaviour of Fe-28Al-15Si-2Mo Alloy 

    Švec, Martin; Vodičková, Věra; Hanus, Pavel; Pazourková Prokopčáková, Petra; Čamek, Libor; Moravec, Jaromír (MDPI, 2021-06-01)
    This paper describes the structure and properties of cast Fe3Al-based alloy doped with 15 at. % of silicon and 2 at. % of molybdenum. The higher content of silicon is useful for the enhancement of high-temperature mechanical ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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) ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Production of Prototype Parts Using Direct Metal Laser Sintering Technology 

    Sedlák, Josef; Zemčík, Oskar; Slaný, Martin; Chladil, Josef; Kouřil, Karel; Sekerka, Vít; Rozkošný, Luboš (ČVUT, 2015-09-01)
    Unconventional methods of modern materials preparation include additive technologies which involve the sintering of powders of different chemical composition, granularity, physical, chemical and other utility properties. ...
  • Changes in the surface layer of rolled bearing steel 

    Zemčík, Oskar; Sedlák, Josef; Chladil, Josef (ČVUT, 2015-10-31)
    This paper describes changes observed in bearing steel due to roller burnishing. Hydrostatic roller burnishing was selected as the most suitable method for performing roller burnishing on hardened bearing steel. The ...
  • Influence of heat treatment and nickel content on the properties of GX4CrNi13-4 steel 

    Kaňa, Václav; Krutiš, Vladimír; Bořil, Petr; Záděra, Antonín; Rimko, Marcel (Polish Academy of Sciences, Institute of Metallurgy and Materials Science, 2020-10-19)
    For the EN GX4CrNi13-4 martensitic stainless steel, research was conducted to investigate the impact of the quenching intensity and the content of nickel on the mechanical properties and amount of retained austenite. It ...
  • The Effect of Simultaneous Si and Ti/Mo Alloying on High-Temperature Strength of Fe3Al-Based Iron Aluminides 

    vodickova, vera; Švec, Martin; Hanus, Pavel; Novák, Pavel; Záděra, Antonín; Keller, Vojtěch; Prokopčáková, Petra (MDPI, 2020-08-03)
    The effect of phase composition and morphology on high-temperature strength in the compression of Fe-Al-Si-based iron aluminides manufactured by casting was investigated. The structure and high-temperature strength in the ...

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