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    Wyświetlanie 1-5 z 5
    Tytuł:
    Electroplastic Effect of High Manganese Austenitic Steel
    Autorzy:
    Zimniak, Z.
    Dobras, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/353766.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    electroplastic effect
    high manganese steel
    TWIP effect
    Opis:
    The article presents the results of the investigations performed on high manganese austenitic steel which underwent the test of uniaxial tension, with the application of electric current impulses. The application of low voltage impulse alternating current of high intensity during the plastic deformation of the examined steel caused the occurrence of the electroplastic effect, which changed the shape of the stress-strain curve. A drop of flow stress and elongation of the tested material was observed in the case of the application of electric current impulses, in respect of the material stretched without such impulses and stretched at an elevated temperature. The analysis of the morphology of the fractures showed differences between the samples tested under the particular conditions. An analysis of the alloy’s microstructure was also performed under different conditions. The application of electric current impulses can have a significant influence on the reduction of the forces in the plastic forming processes for this type of steel.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 1; 431-436
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructure and Texture Evolution During Cold-Rolling in the Fe-23Mn-3Si-3Al Alloy
    Rozwój mikrostruktury i tekstury w walcowanym na zimno stopie Fe-23Mn-3Si-3Al
    Autorzy:
    Kowalska, J.
    Ratuszek, W.
    Witkowska, M.
    Zielińska-Lipiec, A.
    Kowalski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/356606.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    microstructure
    texture
    alloy
    TRIP effect
    TWIP effect
    mikrostruktura
    tekstura
    stop
    TRIP
    TWIP
    Opis:
    Fe–23wt.%Mn–3wt.%Si–3wt.%Al alloy was cast, homogenized at 1150ºC, hot-rolled at temperatures between 1200ºC and 900ºC and next cold-rolled from 5% up to 40% reductions in thickness. Microstructure and texture of this alloy, which has a low stacking fault energy, were defined after cold-rolling. Investigation of transmission electron microscopy and X-ray diffraction showed that mechanical twinning and martensitic transformations (γfcc→εhcp and γfcc→εhcp→α′bcc) took place during cold-rolling. The crystallographic Shoji-Nishiyama (S-N) {00.2}ε║{111}γ, <11.0>ε ║ <110>γ and Kurdjumov-Sachs (K-S) {111}γ║{101}α’, <101>γ║<111>α’ relations between martensite (ε, α’) and austenite (γ), were found in the coldrolled material.
    W artykule zamieszczono wyniki badań mikrostruktury i tekstury otrzymane dla stopu Fe–23%Mn–3%Si–3%Al (% masowe). Po odlaniu wlewek homogenizowano przy temperaturze 1150ºC, walcowano na gorąco w zakresie temperatur 1200ºC-900ºC i następnie walcowano na zimno do odkształceń od 5% do 40%. Wyniki badań uzyskane przy użyciu transmisyjnej mikroskopii elektronowej i metod dyfrakcyjnych wskazują, że podczas odkształcenia plastycznego na zimno w stopie zachodzi mechaniczne bliźniakowanie i przemiana martenzytyczna. Występują zależności krystalograficzne pomiędzy austenitem (faza γ) i martenzytem (faza ε i faza α’), które opisują zależności: Shoji-Nishiyama {00.2}ε || {111}γ, <11.0>ε || <110>γ i Kurdjumowa-Sachsa {111}γ || {110}α, <110>γ || <111>α.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 3A; 1789-1794
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical Properties of High-Mn Austenitic Steel Tested under Static and Dynamic Conditions
    Autorzy:
    Dobrzański, L. A.
    Borek, W.
    Mazurkiewicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/356028.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high manganese steels
    TWIP mechanism
    strain rate
    mechanical properties
    structure
    Opis:
    The purpose of the paper is to investigate X73MnSiAlNbTi25-1-3 high manganese austenitic steel containing 0.73% C to determine structural mechanisms decisive for increasing a reserve of cold deformation energy of such steel. The influence of a strain rate on the structure of the investigated steels and on the structural mechanisms decisive for their properties was analysed. Specialist research instrumentation was used for this purpose such as Scanning Transmission Microscopy (including EBSD examinations), conventional and high-resolution transmission electron microscopy together with diffraction examinations and metallographic examinations. It was found that the principal cause of an increased reserve of cold deformation energy of the investigated steels in dynamic conditions is the activation of mechanical twinning in the mutually intersecting systems in austenite grains and annealing twins, which are densifying when a cold deformation rate is growing, thereby confirming the basic mechanism of TWIP (TWinning Induced Plasticity).
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2A; 725-730
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Role of materials design in maintenance engineering in the context of industry 4.0 idea
    Autorzy:
    Dobrzański, L. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/368329.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    maintenance
    4.0 stage of economy
    industry development
    materials development
    designing material conservation and manufacturing 3MD
    selective laser sintering
    implant-scaffold
    laser texturization
    multicrystalline silicon cells
    cracking counteraction
    austenitic steel
    TWIP steels
    TRIP steel
    wear-resistant
    CVD coatings
    PVD coatings
    cutting tool materials
    Al alloy matrix nanocomposites
    carbon nanotubes
    graphene
    dye synthesised solar cells
    ALD coatings
    dentistry
    photovoltaics
    konserwacja
    przemysł 4.0
    rozwój przemysłu
    rozwój materiałów
    selektywne spiekanie laserowe
    rusztowanie implantowe
    teksturyzacja
    ogniwa krzemowe
    pękanie stali
    stal austenityczna
    stal TWIP
    stal TRIP
    odporność na ścieranie
    powłoki CVD
    powłoki PVD
    narzędzia skrawające
    nanokompozyty
    osnowa aluminiowa
    nanorurki węglowe
    grafen
    ogniwo słoneczne
    powłoki ALD
    stomatologia
    fotowoltaika
    Opis:
    Purpose: The paper presents the issues of designing the maintenance of materials and products in accordance with the idea of Industry 4.0. The author's views on the need for augmentation of the Industry 4.0 model were also presented, as well as the author's original concept that hybrid activities in predictive maintenance and condition-based maintenance should be preceded by designing material, maintenance & manufacturing 3MD at the stage of the product's material designing and technological designing. The 3MD approach significantly reduces the frequency of assumed actions, procedures and resources necessary to remain the condition of this product for the longest possible time, enabling it to perform the designed working functions. Examples of own advanced research on several selected, newly developed materials, used in very different areas of application, confirmed the validity of the scientific hypothesis and the relationship between the studied phenomena and structural effects and the working functions of products and their maintenance and indicated that material design is one of the most important elements guaranteeing progress production at the stage of Industry 4.0 of the industrial revolution. Design/methodology/approach: The author's considerations are based on an extensive literature study and the results of the author's previous study and empirical work. Each of the examples given required the use of a full set of research methods available to modern material engineering, including HRTEM high-resolution transmission electron microscopy. Findings: The most interesting intellectual achievements contained in the paper include presentations of the author's original concepts regarding the augmentation of the Industry 4.0 model, which has been distributed so far, which not only requires augmentation but is actually only one of the 4 elements of the technology platform of the extended holistic model of current industrial development, concerning cyber-IT production aided system. The author also presents his own concept for designing material, maintenance and manufacturing 3MD already at the stage of material and technological design of the product, eliminating many problems related to product maintenance, even before they are manufactured and put into exploitation. Detailed results of detailed structural researches of several selected avant-garde engineering materials and discussion of structural changes that accompanying their manufacturing and/or processing are also included. Originality/value: The originality of the paper is associated with the novelty of the approach to analysing maintenance problems of materials and products, taking into account the requirements of the contemporary stage of Industry 4.0 development. The value of the paper is mainly associated with the presentation of original issues referred to as findings, including the concept of augmentation of the Industry 4.0 model and the introduction and experimental confirmation of the idea by designing material, maintenance and manufacturing 3MD.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2019, 96, 1; 12-49
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of plastic deformation rate at room temperature on structure and mechanical properties of high-Mn austenitic Mn-Al-Si 25-3-3 type steel
    Autorzy:
    Borek, W.
    Lis, M.
    Gołombek, K.
    Sakiewicz, P.
    Piotrowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/378652.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    high-Mn steel
    TWIP type steel
    plastic deformation
    twinning
    dynamic deformation
    structure
    mechanical properties
    stal wysokomanganowa
    stal TWIP
    odkształcenie plastyczne
    bliźniakowanie
    odkształcenie dynamiczne
    struktura
    własności mechaniczne
    Opis:
    Purpose: The aim of the paper is to determine influence of plastic deformation rate at room temperature on structure and mechanical properties of high-Mn austenitic Mn-Al-Si 25-3-3 type steel tested at room temperature. Design/methodology/approach: Mechanical properties of tested steel was determined using Zwick Z100 static testing machine for testing with the deformation speed equal 0.008 s-1, and RSO rotary hammer for testing with deformation speeds of 250, 500 and 1000s-1. The microstructure evolution samples tested in static and dynamic conditions was determined in metallographic investigations using light microscopy as well as X-ray diffraction. Findings: Based on X-ray phase analysis results, together with observation using metallographic microscope, it was concluded, that the investigated high-Mn X13MnAlSiNbTi25-3-3 steel demonstrates austenitic structure with numerous mechanical twins, what agrees with TWIP effect. It was demonstrated, that raise of plastic deformation rate produces higher tensile strength UTS and higher conventional yield point YS0.2. The UTS strength values for deformation rate 250, 500 and 1000 s-1 grew by: 35, 24 and 31%, appropriately, whereas in case of YS0.2 these were: 7, 74 and 130%, accordingly, in respect to the results for the investigated steel deformed under static conditions, where UTS and YS0.2 values are 1050 MPa and 700 MPa. Opposite tendency was observed for experimentally measured uniform and total relative elongation. Homogeneous austenitic structure was confirmed by X-ray diffractometer tests. Research limitations/implications: To fully describe influence of strain rates on structure and mechanical properties, further investigations specially with using transmission electron microscope are required. Practical implications: Knowledge about obtained microstructures and mechanical properties results of tested X13MnAlSiNbTi25-3-3 steel under static and dynamic conditions can be useful for the appropriate use of this type of engineering material in machines and equipment susceptible to static or dynamic loads. Originality/value: The influence of plastic deformation at room temperature under static and dynamic conditions of new-developed high-manganese austenitic X13MnAlSiNbTi25-3-3 steels were investigated.
    Źródło:
    Archives of Materials Science and Engineering; 2019, 96, 1; 22-31
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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