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    Wyświetlanie 1-15 z 15
    Tytuł:
    Microstructure and Creep Resistance of Mg-Al-Ca-Sr Alloys
    Mikrostruktura i odporność na pełzanie stopów magnezu Mg-Al-Ca-Sr
    Autorzy:
    Rzychoń, T.
    Adamczyk-Cieślak, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/355876.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cast magnesium alloys
    Mg-Al-Ca-Sr alloys
    microstructure
    mechanical properties
    odlewnicze stopy magnezu
    stopy Mg-Al-Ca-Sr
    mikrostruktura
    właściwości mechaniczne
    Opis:
    Microstructure and creep properties of cast Mg-Al-Ca-Sr alloys have been investigated. The microstructure was characterized using light microscopy, scanning and transmission electron microscopy. Phase identification was made by EBSD technique and by SAED analysis. The measurement of volume fraction of intermetallic phases was performed using quantitative metallography. Creep tests were performed at 180°C and at applied stress between 45 and 90 MPa. Microstructure of tested alloys composed of α-Mg grains and intermetallic compounds in the interdendritic regions. It was found that the addition of calcium and strontium improves creep resistance at 180°C.
    W artykule przedstawiono wyniki badań mikrostruktury i odporności na pełzanie odlewniczych stopów magnezu Mg-Al-Ca-Sr. Mikrostrukturę badano metodami mikroskopii świetlnej, skaningowej i elektronowej transmisyjnej. Identyfikacji faz dokonano metodami EBSD i dyfrakcji elektronów (TEM). Pomiar udziałów objętościowych faz dokonano za pomocą metalografii ilościowej. Badania odporności na pełzanie przeprowadzono w temperaturze 180°C przez 100 h. Mikrostruktura badanych stopów składa się z ziaren roztworu stałego α-Mg i faz międzymetalicznych w przestrzeniach międzydendrytycznych. Stwierdzono, że dodatek wapnia i strontu poprawia odporność na pełzanie w temperaturze 180°C.
    Źródło:
    Archives of Metallurgy and Materials; 2014, 59, 1; 329-334
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of the Microstructural Evolution on the Corrosion Resistance of Cold Drawn Copper Single Crystals in NaCl
    Autorzy:
    Koralnik, M.
    Dobkowska, A.
    Adamczyk-Cieslak, B.
    Mizera, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/353064.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    copper single crystal
    microstructure evolution
    texture evolution
    impedance spectroscopy
    potentiodynamic polarization
    open circuit potential
    Opis:
    The aim of the present work was to determine the influence of the microstructural evolution of copper single crystals with the initial orientations of <001> and <111> after cold drawing on their corrosion resistance. Transmission electron microscopy, X-ray diffraction, and electron backscattering diffraction were used to characterize the microstructural changes. To evaluate the corrosion resistance after deformation, open circuit potential, electrochemical impedance spectroscopy, and potentiodynamic polarization analyses were conducted. The microstructural observations showed the presence of dislocation cell structures and shear bands indeformed sample with initial orientation <001> single crystal, as well as a strongly-developed substructure in sample <111>. The material with initial orientation of <001> was more resistive in analyzed medium than material with the initial orientation of <111>.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 1; 55-64
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crystallographic Texture and Grain Refinement in the CuCr Alloy Deformed by SPD Method
    Autorzy:
    Urbańczyk-Gucwa, A.
    Brzezińska, A.
    Adamczyk-Cieślak, B.
    Rodak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/354979.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    severe plastic deformation
    heat treatment
    microstructure
    texture
    CuCr0.6 alloy
    Opis:
    Microstructure and texture of the CuCr0.6 alloy processed by rolling with cyclic movement of rolls (RCMR) at room temperature were investigated. The RCMR processing was applied for the samples in different initial conditions in the solid solution followed by quenching into iced water at 1000°C for 3 h and in aging treatment conditions performed at 500°C for 2 h and at 700°C for 24 h. Application of the solution and aging processes prior to RCMR deformation results in the partial dissolution of Cr particles into the Cu matrix and precipitation of the second phase particles. RCMR processing with value of the total effective strain (εft) of 5 was introduced to the material. It was found that the RCMR method is effective in texture weakening. The obtained results revealed that there is a large similarity in texture orientations after RCMR processing independently of heat treatment conditions. Cyclic character of deformation leads to an incomplete transition of LAB to HAB.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 4; 1563-1568
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Comparison of the Microstructure and Corrosion Resistance of Sand Cast Aluminum Alloys
    Autorzy:
    Dobkowska, A.
    Adamczyk–Cieślak, B.
    Mizera, J.
    Kurzydłowski, K. J.
    Kiełbus, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/352870.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminium-silicon-magnesium alloys
    microstructure
    corrosion
    Opis:
    The influence of different types of precipitation on the corrosion behavior was investigated in three aluminum-siliconmagnesium alloys. The microstructures of the alloys were studied through optical (OM) and scanning electron microscopy (SEM). The structures consisted of an α-Al solid solution matrix, Si eutectic crystals, secondary phases AlFeSi and AlMgFeSi (Chinese script), as well as Mg2Si. The corrosion behavior was examined with the use of a potentiodynamic polarization test followed by a SEM surface analysis. The results indicate that all the analyzed samples were in the passive state and AlSi10Mg was less reactive in the corrosive environment.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 1; 209-212
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Precipitation Processes and Mechanical Properties of Aged Inconel 718 Alloy after Annealing
    Autorzy:
    Maj, P.
    Adamczyk-Cieślak, B.
    Slesik, M.
    Mizera, J.
    Pieja, T.
    Sieniawski, J.
    Gancarczyk, T.
    Dudek, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/352832.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    inconel 718
    mechanical properties
    heat treatment
    Opis:
    Inconel 718 is a precipitation hardenable nickel-iron based superalloy. It has exceptionally high strength and ductility compared to other metallic materials. This is due to intense precipitation of the γ’ and γ” strengthening phases in the temperature range 650-850°C. The main purpose of the authors was to analyze the aging process in Inconel 718 obtained in accordance with AMS 5596, and its effect on the mechanical properties. Tensile and hardness tests were used to evaluate the mechanical properties, in the initial aging process and after reheating, as a function of temperature and time respectively in the ranges 650°-900°C and 5-480 min. In addition, to link the mechanical properties with the microstructure transmission microscopy observations were carried out in selected specimens. As a result, factors influencing the microstructure changes at various stages of strengthening were observed. The authors found that the γ’’ phase nucleates mostly homogenously in the temperature range 650-750°C, causing the greatest increase in strength. On the other hand, the γ’ and δ phases are formed heterogeneously at 850°C or after longer annealing in 800°C, which may weaken the material.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 3; 1695-1702
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of Structural Steel Containing 3÷5 wt% Al with Microlaminated Microstructure
    Autorzy:
    Garbarz, B.
    Adamczyk, M.
    Niżnik-Harańczyk, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/351953.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high strength steel
    alloying with aluminium
    microlaminated microstructure
    Opis:
    The aim of this work was to develop basic parameters of hot rolling and controlled cooling technology allowing to obtain the microlaminated (lamellar) microstructure in a lean-alloy structural steel containing 3÷5 wt % Al. Thermo-mechanical rolling tests of two experimental steels were carried out in a semi-industrial line comprising a one – stand reversing rolling mill. The final microstructure of the specimens subjected to rolling in the γ + α stability region characterised with the microlaminated morphology composed of lamellae of ferrite with thickness down to 1 μm or less and lamellae or grains of phases developed during transformation of the austenite. Determined parameters of the thermo-mechanical processing allowed to achieve very attractive mechanical properties of the experimental steels: tensile strength over 1.0 GPa and ductility level (total elongation) better than 15%.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 4; 2309-2315
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimisation of Mechanical Properties of 18%Ni350 Grade Maraging Steel Using Novel Heat Treatment
    Autorzy:
    Marcisz, J.
    Adamczyk, M.
    Garbarz, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/353655.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    maraging steel
    short-time ageing
    mechanical properties
    microstructure
    HRTEM
    Opis:
    The paper presents results of examinations of properties and microstructure of maraging steel grade MS350 (18Ni350) produced by a novel heat treatment method called „short-time ageing“. It has been found that maraging steel after application of the short-time ageing achieves unique properties, in particular good combination of strength and impact toughness. After short-time ageing for time of heating up to 600 seconds at temperature of 550°C hardness in the range from 48 to 56 HRC, tensile strength ranging from 2000 to 2250 MPa, yield strength from 1930 to 2170 MPa and total elongation in the range 7-8% as well as notch impact toughness of 20 J/cm2 at temperature minus 40°C were obtained. Results of microstructure examination in transmission electron microscope (TEM) with application of high resolution technique (HRTEM) have shown presence of Ni3Mo nano-precipitates of orthorhombic crystallographic structure. Precipitates were characterized by rod-like shape and were homogenously distributed in martensitic matrix of steel with high density of dislocations. The average size of cross-section of precipitates was ca. 4 nm while length reached several dozen of nm.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 1; 73-84
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Sr2+ Dopant on Microstructure and Electric Properties of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 (BCZT) Ceramics
    Autorzy:
    Radoszewska, D.
    Goryczka, T.
    Adamczyk, M.
    Wodecka-Duś, B.
    Bochenek, D.
    Kozielski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/352406.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    microstructure
    Sr2+
    electric properties
    (BaxCa1-x)(ZryTi1-x)O3
    Opis:
    The discovery of (BaxCa1-x)(ZryTi 1-x)O3 lead-free ceramics drawn a lot of attention to those novel materials because of their excellent piezoelectric properties. However, quite a little attention has been paid to other features of the material. This article reports a wide range of research, including composition, structure and microstructure, dielectric response and impedance spectroscopy in order to systematize and expand knowledge about this peculiar ceramics and strontium doping effect on its properties. In order to test that influence a series of samples with various strontium concentration, precisely the admixtures of 0.02, 0.04 and 0.06 mol% were prepared, as well as basic ceramics to compare obtained results.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 3; 1295-1302
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical Behavior of Nitrocarburised Austenitic Steel Coated with N-DLC by Means of DC and Pulsed Glow Discharge
    Autorzy:
    Borowski, Tomasz
    Kulikowski, Krzysztof
    Spychalski, Maciej
    Rożniatowski, Krzysztof
    Rajchel, B.
    Adamczyk-Cieślak, Bogusława
    Wierzchoń, Tadeusz
    Powiązania:
    https://bibliotekanauki.pl/articles/2048867.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    DLC
    nitrocarburizing
    surface engineering
    hardness
    adhesion
    wear
    Opis:
    AISI 316L steel was subjected to nitrocarburizing under glow discharge conditions, which was followed by DLC (diamond-like carbon) coatings deposition using the same device. The coatings were applied under conditions of direct current and pulsed glow discharge. In order to determine the influence of the produced nitrocarbon austenite layer and the type of discharge on the microstructure and mechanical properties of the coatings, the following features were analysed: surface roughness, coating thickness, structure, chemical composition, adhesion and resistance to frictional wear. For comparison purposes, DLC coatings were also deposited on steel without a nitrocarburised layer. The obtained results indicate a significant influence of the type of glow discharge on the roughness, hardness, nitrogen content and of the nitrocarburised layer on the resistance to wear by friction and adhesion of the produced coatings.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 1; 317-324
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Technology and Structural Properties of Special Glass Modified (Ba0.6Pb0.4)TiO3 Ceramics
    Autorzy:
    Wodecka-Dus, B.
    Adamczyk, M.
    Goryczka, T.
    Dzik, J.
    Radoszewska, D.
    Kozielski, L.
    Bochenek, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/351884.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    (BaxPb1−x)TiO3 ceramics
    special glasses
    SEM microstructures
    XRD measurements
    Opis:
    The present paper widely describes the details of technology of (Ba0.6Pb0.4)TiO3 ceramics modified with PbO-B2O3-Al2O3-WO3 special glass, as well as the influence of admixture on the microstructure and crystal structure of basic material. The microstructure investigations reveal the significant increase of grain size and a decrease of pores participation in volume of modified samples, whereas the X-Ray Diffraction (XRD) measurements show a decrease of the volume of unit cell. The obtained results are discussed due to processes occurring during the sintering process at high temperature.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 4; 1761-1766
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of La3+ Doping Effect on Piezoelectric Coefficients of BLT Ceramics
    Autorzy:
    Wodecka-Dus, B.
    Kozielski, L.
    Erhart, J.
    Pawełczyk, M.
    Radoszewska, D.
    Adamczyk, M.
    Bochenek, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/352118.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    BLT
    piezoelectric coefficients
    Lead-free piezoelectric ceramics
    Opis:
    Effects of La3+ admixture in barium lanthanum titanate (BLT) ceramics system with colossal permittivity on performance of prospective piezoelectric cold plasma application were studied. Usage of cold atmospheric pressure plasma appears promising in terms of industrial and healthcare applications. Performed investigation provide consistent evaluation of doping lanthanum amount on piezoelectric coefficients values with simultaneous capability of charge accumulation for effective plasma generation. Modification of ferroelectric materials with heterovalent ions, however with the lower radii than the original atoms, significantly affects their domain mobility and consequently electromechanical properties. To determine the piezoelectric coefficients, the resonanceantiresonance method was implemented, and values of piezoelectric and dielectric parameters were recorded. Finally the results indicated that addition of 0.4 mol.% of La3+ ions to the ceramic structure maximally increased the values of piezoelectric coefficient to d33 = 20 pC/N and to huge dielectric constant to ε33 T = 29277.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2A; 691-696
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Multicomponent PZT-Type Ceramics for Micromechatronic Applications
    Autorzy:
    Bochenek, D.
    Niemiec, P.
    Adamczyk, M.
    Skulski, R.
    Zachariasz, R.
    Wodecka-Duś, B.
    Machnik, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/353571.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    multicomponent PZT-type ceramics
    piezoelectrics
    micromechatronics
    actuators
    Opis:
    In the paper two compositions of the multi-component PZT-type ceramics admixtures by Mn4+, Sb3+, W6+, Ni6+ were presented. The ceramic powders were synthesized by the calcination of powders while their densification was carried out by free sintering method. The dielectric, ferroelectric, piezoelectric studies and DC electrical conductivity of the multicomponent PZT-type samples were presented. The results of the multi-component ceramics predispose these type materials in micromechatronic and microelectronic applications for example as element of the actuators.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2A; 667-672
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Ho Doping Contents on the Structural, Microstructure and Dielectric Properties of Bi5Ti3FeO15 Aurivillius Ceramics
    Autorzy:
    Tomaszewska, M.
    Dzik, J.
    Wodecka-Duś, B.
    Pikula, T.
    Adamczyk-Habrajska, M.
    Szalbot, D.
    Chocyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049646.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ceramics
    Bi5Ti3FeO15
    Ho3+ doping
    microstructure
    structure
    dielectric properties
    Opis:
    Aurivillius Bi5-xHoxTi3FeO15 (BHTFO) multiferroic ceramics with different holmium doping contents were synthesized by conventional solid state reaction. The effect of holmium doping on the microstructure, structural and dielectric behaviors of BHTFO ceramics were investigated in details. Microstructure and crystalline structure studies of ceramics were carried out at room temperature while dielectric properties were investigated in a wide range of temperature (T = 25ºC-550ºC) and frequency (20Hz-1MHz).
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 91-96
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of phase transition in Bi3TiNbO9-BaBi2Nb2O9 ceramics
    Autorzy:
    Adamczyk, M.
    Kusz, J.
    Hofmeister, W.
    Zubko, M.
    Kozielski, L.
    Pilch, M.
    Bochenek, D.
    Wodecka-Duś, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/353210.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dielectric properties
    X-ray methods
    grain size
    phase transition
    ceramics
    Opis:
    The subject of the paper is lead free bismuth layer structure oxides (1-x)Bi3TiNbO9-xBaBi2N2O9(x=0; 1; 2; 3 mol). The influence of Bi3TiNbO9/BaBi2Nb2O9 ratio on dielectric and structural properties was studied in a wide range of temperatures. Change in the ratio causes a decrease in the maximum value of dielectric permittivity and shifts the temperature of ε`max to low values, leading to linear decreasing of average grain size and linear increasing of ceramics density. These results indicate an augment of the packing degree and the participation of pores are significantly decreased with the increase of BaBi2Nb2O9compound intake. Moreover, for 0.7Bi3TiNbO9-0.3BaBi2Nb2O9 ceramics the dielectric phase transition is broadened and the properties characteristic for the ferroelectric relaxor appear.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 3; 1503-1510
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Calcium Ions on the Structure and Properties of LaMnO3
    Autorzy:
    Bara, M.
    Dzik, J.
    Feliksik, K.
    Kozielski, L.
    Wodecka-Duś, B.
    Goryczka, T.
    Zarycka, A.
    Adamczyk-Habrajska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/353112.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    LCMO
    ceramics
    manganites
    X-ray diffraction
    SEM
    Opis:
    La0,7 Ca0,3 MnO3 polycrystalline were synthesized from La2 O3 , CaO and MnO2 powder mixture using a solid state reaction technique. The compound powders were obtained through the free sintering method at different temperatures and sintering times in order to study the influence of technological conditions on Ca doped La manganites. The most important physical features as structure, microstructure and morphology were described after X-ray diffraction investigation. Photographs of the specimen fractures were taken with SEM (scanning electron microscope) and they revealed high porosity of the tested material and great tendency for its grains to create agglomerates. Influence of doping and technological conditions on lattice parameters were studied by means of Rietvield analysis. The XRD measurements reveal that La0,7 Ca0,3 MnO3 has orthorhombic symmetry with Pnma space group.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 3; 1189-1195
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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