Now showing items 1-20 of 25

  • Analysis of Machinability and Crack Occurrence of Steels 1.2363 and 1.2343ESR Machined by Die-Sinking EDM 

    Mouralová, Kateřina; Beneš, Libor; Bednář, Josef; Zahradníček, Radim; Prokeš, Tomáš; Fries, Jiří (MDPI, 2020-04-19)
    Die-sinking electric discharge machining (EDM) is an indispensable technological operation, especially in the production of molds and all internal and external shapes and cavities. For this reason, the effect of machine ...
  • Analysis of the machinability of copper alloy Ampcoloy by WEDM 

    Mouralová, Kateřina; Beneš, Libor; Prokeš, Tomáš; Bednář, Josef; Zahradníček, Radim; Jankových, Róbert; Fries, Jiří; Vontor, Jakub (MDPI, 2020-02-11)
    The unconventional technology wire electrical discharge machining is widely used in all areas of industry. For this reason, there is always an effort for efficient machining at the lowest possible cost. For this purpose, ...
  • Assessment of Retained Austenite in Fine Grained Inductive Heat Treated Spring Steel 

    Olina, Anna; Píška, Miroslav; Petrenec, Martin; Hervoches, Charles; Beran, Přemysl; Pechoušek, Jiří; Král, Petr (MDPI, 2019-12-05)
    Advanced thermomechanical hot rolling is becoming a widely used technology for the production of fine-grained spring steel. Different rapid phase transformations during the inductive heat treatment of such steel causes the ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 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 ...
  • Fatigue Life of 7475-T7351 Aluminum After Local Severe Plastic Deformation Caused by Machining 

    Ohnišťová, Petra; Píška, Miroslav; Petrenec, Martin; Dluhoš, Jiří; Horníková, Jana; Šandera, Pavel (MPDI, 2019-11-03)
    The fatigue properties of thermo-mechanically treated and machined aluminum alloy 7475-T7351 have been studied. The applied advanced machining strategy induced intensive plastic deformation on the machined surface under ...
  • Hardened Steels and Their Machining 

    Osička, Karel; Chladil, Josef (MDPI, 2021-02-12)
    This article discusses the issue of hardened steel machining. Many components in theengineering industry use hardening as the final heat treatment. These components usually occupya significant position in a given assembly ...
  • 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 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 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 ...
  • The Influence of WEDM Parameters Setup on the Occurrence of Defects when Machining Hardox 400 Steel 

    Mouralová, Kateřina; Prokeš, Tomáš; Beneš, Libor; Bednář, Josef (MDPI, 2019-11-09)
    The unconventional WEDM technology is a highly used technology for producing precise and indented shaped parts of all at least electrically conductive materials. This wide use makes this technology applicable in almost all ...
  • The Origins of High-Entropy Alloy Contamination Induced by Mechanical Alloying and Sintering 

    Moravčík, Igor; Kubíček, Antonín; Moravčíková de Almeida Gouva, Larissa; Adam, Ondřej; Kaňa, Václav; Pouchlý, Václav; Záděra, Antonín; Dlouhý, Ivo (MDPI, 2020-09-03)
    One of the prevailing problems for materials produced by powder metallurgy is contamination from various sources. This work deals with the influence of process parameters and presence of process control agents (PCA) on the ...
  • 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 ...
  • Precision Machining of Nimonic C 263 Super AlloyUsing WEDM 

    Mouralová, Kateřina; Beneš, Libor; Bednář, Josef; Zahradníček, Radim; Prokeš, Tomáš; Fiala, Zdeněk; Fries, Jiří (MDPI, 2020-06-24)
    Wire electrical discharge machining (WEDM) is an unconventional and very efficient technology for precision machining of the Nimonic C 263 super alloy, which is very widespread, especially in the energy, aerospace and ...
  • 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. ...
  • Study of materials produced by powder metallurgy using classical and modern additive laser technology 

    Sedlák, Josef; Říčan, Daniel; Píška, Miroslav; Rozkošný, Luboš (Elsevier, 2015-02-24)
    The paper focuses on an analysis of materials produced by modern classic additive method direct metal laser sintering (i.e. powder metallurgy). Direct metal laser sintering belongs to file of additive technologies of rapid ...
  • Study of micro structural material changes after WEDM based on TEM lamella analysis 

    Mouralová, Kateřina; Zahradníček, Radim; Beneš, Libor; Prokeš, Tomáš; Hrdý, Radim; Fries, Jiří (MDPI, 2020-06-07)
    Wire electrical discharge machining is an unconventional machining technology that is crucial in many industries. The surface quality of the machined parts is carefully monitored, but the condition of the subsurface layer ...