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    Wyświetlanie 1-6 z 6
    Tytuł:
    Hybrid layer type CR/LPC
    Autorzy:
    Dybowski, K.
    Kowalczyk, P.
    Januszewicz, B.
    Batory, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/102424.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    hybrid layer
    thermo-chemical treatment
    metallization
    diffusion
    Opis:
    Application of metal coatings and the carburized layer are widely known and readily used for various elements, depending on the application. Metal coatings based on chromium are used in order to increase resistance to wear, corrosion and erosion. The coatings applied by different methods have a significant drawback - they are not well related with the substratum, so there is a risk of cracking or flaking. Any discrepancies and flaws disqualify such a way as to protect the surface. Carburizing processes will be carried out, primarily in order to increase the hardness of the surface layer while maintaining a ductile core of the object. It is likely that the combination of these treatments will provide to increase the hardness of the material. The behavior of the proper order to create hybrid layer ensures the continuity of the resulting layer and its good connection with the steel. The paper presents a hybrid layer consisting of the deposited chrome and PVD in the next stage of low pressure carburizing. Conducted process allows chromium diffusion into the material, the enrichment of the steel and to ensure the continuity of the layer.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 2; 23-27
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the impact of double shot peening on the value of roughness parameter and distribution of stresses in the RSA 501 alloy
    Autorzy:
    Byczkowska, P.
    Sawicki, J.
    Januszewicz, B.
    Stegliński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/957816.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    shot peening
    double shot peening
    surface treatment
    residual stresses
    roughness
    Opis:
    The bead blasting process is widespread in both the automotive and aerospace industry and is performed in order to improve the fatigue strength of various components. Bead blasting is a cold plastic forming process during which the surface of the material processed is hit by small, hard particles consisting of steel pellets, bearing balls or glass beads. It increases the hardness of the outer layer and establishes compression stresses inside it, which is why this processing is often used to improve fatigue strength. Contrary to other peening methods, bead blasting does not result in a reduction in the height of the processed surface’s unevenness in most cases. Shot peening changes the residual tensile stresses into residual compression stresses, thanks to which, the lifetime of the parts processed is extended and their carrying capacity is increased. The double shot peening process proposed by the authors consists in a two-stage bead blasting process. The first stage consists in blasting with round cast steel pellets, pellets cut from wire or cast iron pellets. During the second stage the same samples underwent glass bead blasting. The tests conducted on the RSA-501 aluminum alloy indicate that as a result of the processing medium’s impact in the form of glass beads or pellets of different diameter and shape, a permanent plastic deformation of the material surface occurs. On the basis of the obtained results it is possible to infer that the choice of parameters of both conventional shot peening and the double shot peening determine the impact thereof on the material’s mechanical properties. Thanks to the application of the double shot peening process there is a noticeable decrease in value of the Ra parameter, by about 40% on average. When analyzing the compressive stress results it is possible to state that after the first blasting process the value of stress was increasing when moving deeply into the sample from its surface, while after the glass bead blasting the value of compressive stress was significantly higher already near the surface. Double shot peening results in an increase in the value of compressive stresses by 40-50% when compared to conventional blasting.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 3; 1-9
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Single-Stage and Duplex Shot Peening on Surface Roughness and Residual Stresses in Al Mg5 Mn1 Sc0,8 Zr0,4 Alloy
    Autorzy:
    Byczkowska, P.
    Sawicki, J.
    Januszewicz, B.
    Stegliński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/353741.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    shot peening
    double shot peening
    residual stresses
    roughness
    Opis:
    Conventional shot peening (SP) is cheap surface treatment widely used to enhance fatigue life of mechanical components [3,4]. Basically, it is shooting small particles (shots) on the surface of the sample. However, the process itself is so complex that a lot of companies are not able to optimally employ it due to the amount of parameters that must be controlled all at the same time. The duplex process consists in two stages of shot-peening treatment. The first one consist of shot-peening with spherical cast steel shots or cut wire shots. During the second stage the samples processed in stage one were subject to shot-peening with glass beads. In this work, RSA-501 aluminium alloy was shot peened using shots of different material and diameter and tested using a measurement of residual stresses and surface roughness. Tests and studies conducted so far on RSA-501 aluminium alloy demonstrate that bombardment by a treatment medium in the form of glass beads or shots of various shapes and diameters induces permanent plastic deformation of the surface layer. The roughness achieved after the shot-peening process was determined for each treatment medium. The largest value of Ra parameter was achieved for cut wire shots and this result is consistent with the above-mentioned theoretical knowledge. This medium is the most aggressive one to the surface being treated primarily due to the sharp edges of shots. The duplex process was successful in obtaining higher values of compressive stresses in surface layer than values achievable in conventional single-stage shot peening process.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 1; 505-511
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An analysis of crystallographic texture and residual stresses of aluminium alloy RSA-501 after selected processes of twist extrusion (TE)
    Autorzy:
    Byczkowska, P.
    Sawicki, J.
    Adamczyk-Cieślak, B.
    Januszewicz, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/24200596.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    severe plastic deformation
    twist extrusion
    aluminium
    FEM
    crystallographic texture
    stress
    hardness
    odkształcenie plastyczne
    wyciskanie skrętne
    tekstura krystalograficzna
    naprężenie
    twardość
    Opis:
    Purpose: This study presents the residual stress analysis for the twist extrusion (TE) process after the experiment and numerical simulation and the analysis of the crystallographic texture changes and changes in hardness before and after the TE process for an RSA-501 aluminium alloy (Al; Mg5%; Mn1.5%; Sc0.8%; Zr0.4%). Design/methodology/approach: Crystallographic textures were obtained with the PANAlytical Empyrean X-ray diffractometer. The stresses were measured by applying the X-ray method with the use of using the PROTO iXRD diffractometer. Findings: The use of severe plastic deformation processes in the mass of the material leads to a significant change difference in the stress distribution in the workpiece and a change in texture compared to the reference material. The stress distribution in the sample cross-section and stress values varied and depended on the stage of the twisting process to which the surface was subjected. The highest stress (about 600 MPa) appears at the peaks of the front surface when exiting the twist area die TE. Higher stress values at the edges of the specimen are caused by friction (deformation) of the material against the die surface. The TE process strengthened – the highest crystallographic texture background level was 49%. Practical implications: The conducted tests and the obtained results allow the determination of the process parameters and critical areas of the sample by carrying out a numerical simulation. Originality/value: Microhardness increases due to the TE process and the largest values were observed at the edges. This phenomenon is confirmed by the numerical simulation results presented in this paper.
    Źródło:
    Archives of Materials Science and Engineering; 2022, 118, 1; 5--28
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ atmosfery stosowanej w segmencie dyfuzji w procesach FineLPN na właściwości warstw azotowanych na stalach HS6-5-2 oraz X37CrMo51
    Effects of the atmosphere used during the diffusion segment of the Fi-neLPN technology on the properties of the nitrided layers of steels HS6- 5-2 and X37CrMo51
    Autorzy:
    Kula, P.
    Januszewicz, B.
    Wołowiec, E.
    Rzepkowski, A.
    Pietrasik, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/109128.pdf
    Data publikacji:
    2013
    Wydawca:
    AXIS MEDIA
    Tematy:
    azotowanie niskociśnieniowe
    FineLPN
    stal narzędziowa
    stal szybkotnąca
    piec próżniowy
    obróbka cieplna stali
    dyfuzja
    low pressure nitriding
    tool steel
    high-speed steel
    vacuum furnace
    diffusion
    steel heat treatment
    Opis:
    W artykule przedstawiono badania nad opracowaniem modelu fizycznego wielosegmentowego azotowania niskociśnieniowego o strukturze procesu "boost-diffusion". Opracowany model umożliwi przeprowadzenie obróbki cieplnej i niskociśnieniowego azotowania stali narzędziowej i szybkotnącej w piecu próżniowym.
    The article discusses studies that have j sought to create a physical model of the boost-diffusion multi-segment low-pressure nitriding process. The model would be subsequently used to perform heat treatment and low-pressure nitriding of tool steels and high speed steels in a vacuum furnace.
    Źródło:
    Piece Przemysłowe & Kotły; 2013, 9-10; 42-45
    2082-9833
    Pojawia się w:
    Piece Przemysłowe & Kotły
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synergy of the Plastic Treatment HPT and Shot Peening in Aluminium Alloy Al-Mg-Mn-Sc-Zr
    Autorzy:
    Stegliński, M.
    Byczkowska, P.
    Sawicki, J.
    Kaczmarek, Ł.
    Januszewicz, B.
    Klich, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/355364.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high-pressure torsion
    shot peening
    numerical analysis
    residual stresses
    fatigue strength
    Opis:
    An improvement in fatigue strength is one of the main factors enabling the use of high-durability Al-Mg-Mn-Sc-Zr alloys in functional components of mobile robots. As part of this study, a computer simulation was carried out using ANSYS LS-DYNA software that involved the hybridization of high pressure torsion (HPT) and shot peening (SP) forming processes. The numerical analysis was aimed at determining residual stresses and strains that affect the durability and stress characteristics of the analyzed Al alloy. Results of the study indicate that tensile stresses of σ = 300 MPa generated as a result of HPT are transformed into a beneficial stress of σ = 25 MPa resulting from plastic strains caused by SP surface treatment.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2B; 1135-1142
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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