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Wyszukujesz frazę "Zieliński, M" wg kryterium: Autor

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    Wyświetlanie 1-9 z 9
    Tytuł:
    The service life of the repair welded joint of Cr-Mo / Cr-Mo-Y
    Autorzy:
    Sroka, M.
    Zieliński, A.
    Mikuła, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/355828.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    creep
    welded joint
    Cr-Mo
    Cr-M-V steel
    residual life
    Opis:
    The service life of the repair welded joint of Cr-Mo / Cr-Mo-Y This paper presents the evaluation of the service life of dissimilar repair welded joint from Cr-Mo/Cr-Mo-V steel after 200,000 h service under creep condition. The investigations of microstructure using scanning electron microscopy, investigations of mechanical properties at room and elevated temperature as well as creep tests of the basic material from Cr-Mo and Cr-Mo-V steel and welded joint from these steels were carried out. The investigations allowed the tune of further safe operation of the repair welded joint in relation to the residual life of the materials to be determined. The evaluation of residual life and disposable residual life, and thus the estimation or determination of possible time of further safe operation, is crucial when the elements are operated much beyond the design work time.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 3; 1315-1320
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forecasting the distribution of precipitate diameters in the presence of changes in the structure of the material
    Autorzy:
    Zieliński, A.
    Miczka, M.
    Golański, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/356680.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    microstructure
    precipitates
    statistics
    forecasting
    ageing
    Opis:
    The results of investigations on the microstructure of T23 and T24 low-alloy steels as well as P91 and P92 high-chromium steels in the as-received condition and after 70.000 h annealing at 550-650°C are presented. The quantitative analysis of the existing precipitates was performed for representative images of microstructure. The statistical analysis of collected data allowed the parameters of a selected theoretical statistical distribution to be estimated. A forecast of average precipitate diameter and standard deviation of such a distribution for the time of 100,000 hours at 550 and 600°C for T23 and T24 steels and at 600 and 650°C for P91 and P92 steels was calculated. The obtained results of investigations have made it possible to compare changes in the microstructure of various steel grades due to long-term impact of elevated temperature. They have also confirmed the possibility of using, in evaluating the degradation degree of materials in use, the forecasting methods that derive from mathematical statistics, in particular the theory of stochastic processes and forecast by analogy methods. The presented approach allows the development of a forecast of precipitate diameter probability density under the microstructure instability conditions for selected steel grades. The assessment of material condition that takes into consideration, but is not limited to, the precipitate diameter measurement is useful as an assessment component in estimating the time of safe service of power unit elements working under creep conditions.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 1; 273-280
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Long-Term Impact of Elevated Temperature on Changes in Microstructure and Mechanical Properties of HR3C Steel
    Autorzy:
    Zieliński, A.
    Sroka, M.
    Hernas, A.
    Kremzer, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/353972.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    HR3C steel
    high temperature aging
    microstructure
    mechanical properties
    Opis:
    The HR3C is a new steel for pressure components used in the construction of boilers with supercritical working parameters. In the HR3C steel, due to adding Nb and N, the compounds such as MX, CrNbN and M23C6 precipitate during service at elevated temperature, resulting in changes in mechanical properties. This paper presents the results of microstructure investigations after ageing at 650, 700 and 750°C for 5,000 h. The microstructure investigations were carried out using scanning and transmission electron microscopy. The qualitative and quantitative identification of the existing precipitates was carried out using X-ray analysis of phase composition. The effect elevated temperature on microstructure and mechanical properties of the examined steel was described.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2A; 761-766
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forecasting the Particle Diameter Size Distribution in P92 (X10CrWMoVNb9-2) Steel After Long-Term Ageing at 600 and 650°C
    Autorzy:
    Zieliński, A.
    Sroka, M.
    Miczka, M.
    Śliwa, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/355265.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    P92 steel
    microstructure
    precipitates
    statistics
    forecasting
    Opis:
    The investigations on microstructure of P92 steel in the as-received condition and after 105h ageing at 600 and 650°C were carried out. For the recorded images of microstructure, the quantitative analysis of precipitates was performed. On that basis, a statistical analysis of collected data was made with the aim of estimating parameters of selected theoretical statistical distribution. Then, the forecast for average precipitate diameter and standard deviation of such a distribution for the time of 1,5*105h at 600 and 650°C was calculated. The obtained results of investigations confirm the possibility of using, in evaluation of degradation degree for materials in use, the forecasting methods derived from mathematical statistics, in particular the theory of stochastic processes and methods of forecasting by analogy.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2A; 753-760
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Creep Resistance of VM12 Steel
    Autorzy:
    Zieliński, A.
    Golański, G.
    Dobrzański, J.
    Sroka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/351509.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    creep resistance
    VM12 steel
    elements of boilers with super- and ultra-critical steam parameters
    Opis:
    This article presents selected material characteristics of VM12 steel used for elements of boilers with super- and ultra-critical steam parameters. In particular, abridged and long-term creep tests with and without elongation measurement during testing and investigations of microstructural changes due to long-term impact of temperature and stress were carried out. The practical aspect of the use of creep test results in forecasting the durability of materials operating under creep conditions was presented. The characteristics of steels with regard to creep tests developed in this paper are used in assessment of changes in functional properties of the material of elements operating under creep conditions.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 3; 1635-1640
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Residual Life of Boiler Pressure Parts Made of the 13CrMo4-5 Steel after Long-Term Operation in a Creep Conditions
    Autorzy:
    Dziuba-Kałuża, M.
    Zieliński, A.
    Dobrzański, J.
    Sroka, M.
    Urbańczyk, P.
    Śliwa, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/355671.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    13CrMo4-5 steel
    microstructure
    residual life
    welded joints
    mechanical properties
    Opis:
    This paper presents the method for determination of the time of further safe service for welded joints of boiler components after exceeding the design work time. The evaluation of the life of the parent material and its welded joints was performed. Microstructure investigations using a scanning electron microscope, investigations of strength properties, impact testing, hardness measurements and abridged creep tests of the basic material and welded joints were carried out. The investigations described in this paper allowed the time of further safe service of the examined components made of 13CrMo4-5 steel to be determined. The method for determination of the time of safe service of boiler components working under creep conditions allows their operation beyond the design service life. The obtained results of investigations are part of the materials database developed by the Institute for Ferrous Metallurgy.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 2; 889-897
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Possibility Of Use Of Laser-Modified Ti6Al4V Alloy In Friction Pairs In Endoprostheses
    Możliwość zastosowania modyfikowanego laserowo stopu Ti6Al4V na pary cierne endoprotez
    Autorzy:
    Majkowska, B.
    Jażdżewska, M.
    Wołowiec, E.
    Piekoszewski, W.
    Klimek, L.
    Zieliński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/353034.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    laser treatment
    abrasive wear
    titanium
    endoprostheses
    obróbka laserowa
    zużycie ścierne
    tytan
    endoprotezy
    Opis:
    The purpose of this paper is to show results of laser treatment at cryogenic conditions of the Ti6Al4V alloy used for orthopedic applications. That modification process ought to bring beneficial changes of microstructure and residual stresses in the surface layer. The paper presents the abrasive wear of the base and laser remelted material in association with ceramics Al2O3. Despite the surface cracking after laser treatment the tribological properties in simulated body fluid have been substantially improved.
    Celem artykułu jest pokazanie rezultatów obróbki laserowej w warunkach kriogenicznych stopu Ti6Al4V używanego w aplikacjach ortopedycznych. Tego rodzaju proces modyfikacji powinien przynieść korzystne zmiany w mikrostrukturze i naprężeniach własnych warstwy wierzchniej. Artykuł prezentuje badania odporności na zużycie ścierne materiału podstawowego i nadtopionego laserowo w skojarzeniu z ceramiką Al2O3. Pomimo pęknięć na powierzchni materiału po obróbce laserowej własności tribologiczne badane w roztworze symulującym płyn ustrojowy zostały znacznie ulepszone.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2A; 755-758
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quantitative analysis of stability of 9%Cr steel microstructure after long-term ageing
    Autorzy:
    Golański, G.
    Jasak, J.
    Zieliński, A.
    Kolan, C.
    Urzynicok, M.
    Wieczorek, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/353244.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high-chromium martensitic steels
    microstructure
    carbide precipitation
    Opis:
    The paper presents the results of research on the microstructure of martensitic X10CrMoVNb9-1 (P91) and X13CrMoCo- VNbNB9-2-1 (PB2) steel subject to long-term ageing at the temperature of 620°C and holding times up to 30 000 hours. The microstructural tests of the examined steel types were performed using a scanning microscope Joel JSM - 6610LV and a transmission electron microscope TITAN 80 - 300. The stability of the microstructure of the investigated steels was analyzed using a quantitative analysis of an image, including measurements of the following: the density of dislocations inside martensite/subgrain laths, the width of martensite laths, and the mean diameter of precipitates. It has been concluded that during long-term ageing, the microaddition of boron in PB2 steel significantly influenced the slowing of the process of degradation of the martensitic steel microstructure, as a result of slowing the process of coagulation of M23C6 carbides and Laves phase. It had a favorable effect on the stabilization of lath microstructure as a result of retardation of the processes of recovery and polygonization of the matrix.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 1; 263-271
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Creep Strength of Heterogeneous Welded Joint in HR6W Alloy and Sanicro 25 Steel
    Autorzy:
    Zieliński, A.
    Dobrzański, L.
    Purzyńska, H.
    Sikora, R.
    Dziuba-Kałuża, M.
    Kania, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/353717.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    creep test
    HR6W alloy
    Sanicro 25 steel
    microstructure
    Opis:
    This article presents the results of investigations on HR6W alloy and Sanicro 25 steel and the dissimilar welded joint made of them. The characteristic images of microstructure of the investigated materials in the as-received condition and following the creep test, observed with a scanning electron microscope (SEM), are shown. The X-ray analysis of phase composition of the existing precipitates was carried out. The method for evaluation of creep strength based on abridged creep tests carried out at a temperature higher than the design one is presented. The obtained results do not deviate from the values of creep strength determined in long-term creep tests. The maximum difference in creep strength of the investigated materials is ±20%, which is in compliance with the acceptable scatter band. The methodology presented can be used for verification of creep strength (life time) of the material of finished components to be operated under creep conditions.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 4; 2057-2064
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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