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Wyszukujesz frazę "Mician, M." wg kryterium: Autor

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    Wyświetlanie 1-7 z 7
    Tytuł:
    Material Ultrasonic Attenuation Influence on Conventional Ultrasonic Non-Destructive Copper Alloy Cast Testing
    Autorzy:
    Koňár, R.
    Mičian, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/353084.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ultrasonic testing
    ultrasonic attenuation
    copper alloy casting
    centrifugal casting
    Opis:
    Internal casting defects that are detected by radiography may also be detected by ultrasonic method. Ultrasonic testing allows investigation of the cross-sectional area of a casting, it is considered to be a volumetric inspection method. The high frequency acoustic energy travels through the casting until it hits the opposite surface or an interface or defect. The interface or defect reflects portions of the energy, which are collected in a receiving unit and displayed for the analyst to view. The pattern of the energy deflection can indicate internal defect. Ultrasonic casting testing is very complicated in practice. The complications are mainly due to the coarse-grain structure of the casting that causes a high ultrasound attenuation. High attenuation then makes it impossible to test the entire volume of material. This article is focused on measurement of attenuation, the effect of probe frequency on attenuation and testing results.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 1; 353-357
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of Lack of Fusion and Incomplete Penetration in Butt Weld Joint by Ultrasonic Phased Array Method and X-Ray Method
    Autorzy:
    Koňár, R.
    Mičian, M.
    Boháčik, M.
    Gucwa, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/357016.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    internal defects
    butt weld joint
    nondestructive testing
    lack of fusion
    incomplete penetration
    Opis:
    The main goal of the article is to identify artificially created defects like lack of fusion and incomplete penetration in buttweld joint using non-destructive volumetric methods. These defects are the most serious defects in welds of steel constructionsfrom the safety point of view. For identification, an ultrasonic phased array technique and a conventional X-ray using digital imaging were used. The theoretical part of the article describes the current state of the given issue and provides basic theoretical knowledge about ultrasonic and X-ray welding tests. In the experimental part, the procedure and results of testing butt weld joint are described by both non-destructive methods. The butt weld joint was made from steel S420MC. Each indication obtained by the ultrasonic and x-ray technique is supplemented by the macrostructure of the weld taken from the indication position. The results of the experimental work mentioned in the article point to the possibility and reliability of the identification of melting defects by selected nondestructive methods in terms of their character and orientation.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 1117-1124
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Analysis of Filler Material Effect on Properties of Excavator Crawler Track Shoe after Welding Regeneration
    Autorzy:
    Gucwa, M.
    Winczek, J.
    Wieczorek, P.
    Mičian, M.
    Koňár, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049557.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hardfacing
    carbides
    hardness
    wear
    covered electrode
    Opis:
    The application of hardfacing is one of the ways to restore the functional properties of worn elements. The possibility of using filler materials rich in chrome allows for better wear resistance than base materials used so far. The paper presents the results of research on the use of 3 different grades of covered electrodes for the regeneration of worn track staves. The content of the carbon in the covered electrodes was from 0,5% to 7% and the chromium from 5% to 33%. The microscopic and hardness tests revealed large differences in the structure and properties of the welds. The differences in the hardness of the welds between the materials used were up to 150 HV units. The difference in wear resistance, in the ASTM G65 test, between the best and worst materials was almost 12 times big.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 31-36
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ultrasonic Control of Ductile Cast Iron Castings by Phased Array Technique
    Autorzy:
    Boháčik, M.
    Mičian, M.
    Koňár, R.
    Trško, L.
    Winczek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/380009.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ductile cast iron
    technological casting parameters
    ultrasonic testing
    phased array
    żeliwo sferoidalne
    parametry technologiczne
    badania ultradźwiękowe
    Opis:
    The goal of this article is non-destructive ultrasonic testing of internal castings defects. Our task was to cast several samples with defects like porosity and cavities (where belongs mostly shrinkages) and then pass these samples under ultrasonic testing. The characteristics of ultrasonic control of castings are presented in the theoretical part of this article. Ultrasonic control is a volume non-destructive method that can detect internal defects in controlled materials without damaging the construction. It is one of the most widely used methods of volume non-destructive testing. For experimental control were made several cylindrical samples from ferritic grey and ductile cast iron. Because of the form and dispersion of graphite of grey cast iron it was not possible to make ultrasonic records on this casting with probe we used, so we worked only with ductile cast iron. Ultrasonic records of casting control are shown and described in the experimental part. The evaluation of the measurement results and the reliability of the ultrasonic method in castings control is listed at the end of this article.
    Źródło:
    Archives of Foundry Engineering; 2019, 2; 9-14
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Repair of Foundry Defects in Steel Castings Using Welding Technology
    Autorzy:
    Mičian, M.
    Koňár, R.
    Hlavatý, I.
    Winczek, J.
    Gucwa, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/380199.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    steel casting
    repair by welding
    mechanical testing
    approval of welding procedure
    odlew staliwny
    spawanie naprawcze
    badania mechaniczne
    Opis:
    Use of welding technology for the repair of steel castings is particularly common in two areas. These include weld surfacing of protrusions that remained incomplete after casting, or filling the surface defects (cavities). These defects are more common for steel casting than for graphite cast iron, due to the lower fluidity of steel. This article describes a suitable technological process of repairing the defects on the casting using the welding technology. A specimen produced for this purpose was prepared by carving a groove into a cast steel plate 20 GL, which was then filled with a weld metal using MAG (135) technology. The following evaluation of the basic characteristics of the repaired site point to the suitability of the selected technological parameters of the repair procedure. Metallographic evaluation was carried out, further evaluation of mechanical properties by tensile test, bend test and Vickers hardness test. The proposed methodology for the evaluation repair of foundry defects in steel castings also meets the requirements for the approval of welding procedures in accordance with the relevant valid legislation.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 177-180
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Evaluation of the Wear Mechanism of High-Carbon Hardfacing Layers
    Autorzy:
    Winczek, J.
    Gucwa, M.
    Mičian, M.
    Koňár, R.
    Parzych, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/354160.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hardfacing
    self shielded flux cored arc welding
    cast iron
    erosion
    wear
    structure
    Opis:
    Materials based on cast irons are often used for protection against wear. One of the methods of creating protective surface with cast iron structures is hardfacing. The application of hardfacing with self shielded flux cored wire with high carbon content is one of the economical ways often used to protect machinery parts exposed to both abrasion and erosion. The wear resistance of hardfacings depends on their chemical composition, structure obtained after hardfacing, parameters of depositing process andspecific conditions of wear. As the base material in the investigation the steel grade S235JR was used. The wear behavior mechanism of hardfacings made with one type of self shielded flux cored wire and different process parameters were evaluated in thispaper. Structures obtained in deposition process were different in hardness, amount of carbides and resistance to wear with two investigated impingement angles. The erosion tests showed that impingement angle 30° gives lower erosion rate than angle 60°.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 1111-1115
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical Simulation of Individual Heat-Affected Zones in S960MC Steel
    Autorzy:
    Mičian, M.
    Winczek, J.
    Harmaniak, R.
    Koňár, R.
    Gucwa, M.
    Moravec, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049636.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mechanical properties of heat affected zone
    steel S960MC
    physical simulation
    Gleeble 3500
    Opis:
    This research is focused on the analysis of heat-affected sub-zones in 2 mm thick steel S960MC samples, with the aim of observing and evaluating the mechanical properties after exposure to temperatures corresponding to individual heat-affected sub-zones. Test samples were prepared using a Gleeble 3500 thermo-mechanical simulator. The samples were heated in the range from 550°C to 1350°C and were subsequently quickly cooled. The specimens, together with the base material, were then subjected to tensile testing, impact testing, and micro-hardness measurements in the sample cross-section, as well as evaluation of their microstructure. Fracture surfaces are investigated in samples after impact testing. The heat-affected sub-zones studied indicate high sensitivity to the thermal input of welding. There is a significant decrease in tensile strength and yield strength at temperatures around 550°C.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 81-89
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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