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    Wyświetlanie 1-5 z 5
    Tytuł:
    Properties and Structure of Nanocrystalline Layers Obtained by Manual Metal Arc Welding (MMA)
    Autorzy:
    Górka, J.
    Czupryński, A.
    Adamiak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/351150.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nanocrystalline layer
    crystallite size
    manual metal arc welding
    deposit weld
    Opis:
    The present paper is the result of the investigations of the properties and structure of nanocrystalline layers deposited from iron-based nanoalloy on steel S355N substrate by manual metal arc welding method (MMA). In the process of welding a 100 A current intensity was used with desiccation preheating at 80°C while maintaining the interpass temperature at range of 200°C. The resultant deposit welds were subjected to macro and microscopic metallographic examination, X-ray phase analyses and crystallite size was analyzed by X-ray diffractometry (XRD), additionally EDX chemical composition analysis of precipitates during scanning electron microscopy was performed. Working properties of the obtained nanocrystalline deposit welds were evaluated based on hardness and metal-to-mineral abrasive wear. The results of the deposit welds working properties measurements were compared with the properties of wear resistant steel HARDOX 400 type used as the reference material.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 3; 1479-1484
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Testing of flame sprayed Al2O3 matrix coatings containing TiO2
    Autorzy:
    Czupryński, A.
    Górka, J.
    Adamiak, M.
    Tomiczek, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/356108.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    flame spray process
    coating
    ceramic powder
    abrasive wear resistance
    erosion wear resistance
    adhesion strength
    Opis:
    The paper presents the results of the properties of flame sprayed ceramic coatings using oxide ceramic materials coating of a powdered aluininiuni oxide (Al2O3) matrix with 3% titanium oxide (TiO2) applied to unalloyed S235JR grade structural steel. A primer consisting of a metallic Ni-Al-Mo based powder has been applied to plates with dimensions of 5X200X300 mm and front surfaces of ø40x50 mm cylinders. Flame spraying of primer coating was made using a RotoTec 80 torch, and an external coating was made with a CastoDyn DS 8000 torch. Evaluation of the coating properties was conducted using metallographic testing, phase composition research, measurement of microhardness, substrate coating adhesion (acc. to EN 582:1996 standard), erosion wear resistance (acc. to ASTM G76-95 standard), and abrasive wear resistance (acc. to ASTM G65 standard) and thermal impact. The testing performed has demonstrated that flame spraying with 97% Al2O3 powder containing 3% TiO2 performed in a range of parameters allows for obtaining high-quality ceramic coatings with thickness up to ca. 500 μni on a steel base. Spray coating possesses a structure consisting mainly of aluminium oxide and a small amount of NiAl10O16 and NiAl32O49 phases. The bonding primer coat sprayed with the Ni-Al-Mo powder to the steel substrate and external coating sprayed with the 97%Al2O3 powder with 3% TiO2 addition demonstrates mechanical bonding characteristics. The coating is characterized by a high adhesion to the base amounting to 6.5 MPa. Average hardness of the external coating is ca. 780 HV. The obtained coatings are characterized by high erosion and abrasive wear resistance and the resistance to effects of cyclic thermal shock.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 3; 1363-1370
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study of Susceptibility and Evaluation of Causes of Cracks Formation in Braze-Weld Filler Metal in Lap Joints Aluminum – Carbon Steel Made with Use of CMT Method and High Power Diode Laser
    Autorzy:
    Adamiak, M.
    Wyględacz, B.
    Czupryński, A.
    Górka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/958197.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    braze-welding
    intermetallic compound phase
    high power diode laser
    brazing
    Opis:
    In this article results of studies on cracks formation susceptibility in braze-welded joints of thin aluminum sheets and double-sided zinc galvanized steel sheets for car body parts made by laser brazing with high power diode laser ROFIN DL 020 and CMT MIG-brazing, with filler material in form of powder and wire accordingly, were presented. Optimal welding parameters were determined by visual acceptance criteria. On joints made with optimal parameters further examinations were carried. Results of macro- and microscopic metallographic examinations, structural roentgenography, EDS microanalysis and hardness tests were presented. Causes of brittle intermetallic Fe-Al phases formation in Al-matrix filler metal in dissimilar aluminum – zinc plated carbon steel joints were pointed.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 4; 2113-2123
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Joining of the AMC Composites Reinforced with Ti3Al Intermetallic Particles by Resistance Butt Welding
    Autorzy:
    Adamiak, M.
    Tomiczek, B.
    Górka, J.
    Czupryński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/353835.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    composite materials
    intermetallics
    Ti3Al
    resistance butt welding
    mechanical properties
    Opis:
    The introduction of new reinforcing materials continues to be investigated to improve the final behaviour of AMCs as well as to avoid some drawbacks of using ceramics as reinforcement. The present work investigates the structure, properties and ability of joining aluminium EN-AW 6061 matrix composite materials reinforced with Ti3Al particles by resistance butt welding as well as composite materials produced by mechanical milling, powder metallurgy and hot extrusion techniques. Mechanically milled and extruded composites show finer and better distribution of reinforcement particles, which leads to better mechanical properties of the obtained products. Finer microstructure improves mechanical properties of obtained composites. The hardness increases twice in the case of mechanically milled composites also, a higher reinforcement content results in higher particle dispersion hardening, for 15 wt.% of intermetallics reinforcement concentration composites reach about 400 MPa UTS. Investigation results of joints show that best hardness and tensile properties of joints can be achieved by altering soft conditions of butt welding process e.g. current flow time 1.2 s and current 1400 A. To improve mechanical properties of butt welding joints age hardening techniques can also be used.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2A; 847-852
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Własności i struktura nanokrystalicznych warstw napawanych w odniesieniu do wybranych materiałów konstrukcyjnych odpornych na zużycie ścierne
    Evaluation of the properties and structure of nanocrystalline surface layers in relation to selected constructional materials resistant to abrasive wear
    Autorzy:
    Górka, J.
    Czupryński, A.
    Adamiak, M.
    Kopyść, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/115089.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    zużycie ścierne
    warstwa nanokrystaliczna
    płyta trudnościeralna
    napoina
    abrasive wear
    nanocrystalline layer
    abrasion plate
    deposit weld
    Opis:
    W pracy przedstawiono własności i strukturę warstw nanokrystalicznych wykonanych łukowo metodą MMA nanostopem na osnowie żelaza na podłożu ze stali S355N w porównaniu do wybranych materiałów konstrukcyjnych odpornych na ścieranie stosowanych obecnie w przemyśle. Uzyskane napoiny poddano badaniom metalograficznym makro i mikroskopowym, określono wielkość ziarna z wykorzystaniem dyfraktometru rentgenowskiego Xpert PRO X-rey. Oceny własności użytkowych uzyskanych warstw nanokrystalicznych w porównaniu do obecnie stosowanych materiałów dokonano w oparciu o pomiar twardości oraz badania zużycia ściernego typu metal-minerał. Wyniki własności eksploatacyjnych warstw odniesiono do własności stali HARDOX 400.
    The present paper is the result of the investigations of the properties and structure of nanocrystalline layers deposited from iron-based nanoalloy on steel S355N substrate by manual metal arc welding method (MMA) compared to selected abrasion-resistant construction materials currently used in industry. The resultant deposit welds were subjected to macro and microscopic metallographic examination. Working properties of obtained nanocrystalline deposits weld compared to currently used materials were evaluated based on the hardness, abrasive wear of metal-to-mineral. The results of deposits weld working properties measurements were compared with property of wear resistant steel HARDOX 400 type used as reference material.
    Źródło:
    Welding Technology Review; 2018, 90, 9; 19-23
    0033-2364
    2449-7959
    Pojawia się w:
    Welding Technology Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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