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Wyszukujesz frazę "Kozieł, P." wg kryterium: Wszystkie pola

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    Wyświetlanie 1-9 z 9
    Tytuł:
    Conventional pool fish pass project for small threshold
    Koncepcja komorowej przepławki dla ryb, towarzyszącej małej budowli piętrzącej
    Autorzy:
    Kiraga, M.
    Kozieł, P.
    Naliwajko, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/28765982.pdf
    Data publikacji:
    2022
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    fishway
    chamber fishway
    weir
    dam building
    hydraulics
    hydraulic structure
    environmental impact
    Źródło:
    Acta Scientiarum Polonorum. Architectura; 2022, 21, 3; 55-65
    1644-0633
    Pojawia się w:
    Acta Scientiarum Polonorum. Architectura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of encapsulated and free-living cells of Chlorella vulgaris L. on nitrogen retention in soils
    Autorzy:
    Koziel, W.
    Jaromin-Glen, K.
    Polakowski, C.
    Walkiewicz, A.
    Bulak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/25989.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Źródło:
    International Agrophysics; 2019, 33, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Precipitation Processes during Non-Isothermal Ageing of Fine-Grained 2024 Alloy
    Autorzy:
    Kozieł, J.
    Błaż, L.
    Włoch, G.
    Sobota, J.
    Lobry, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/352499.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AA2024 alloy
    scrap metal milling
    structure refining
    powder metallurgy
    precipitation hardening
    Opis:
    Mechanical alloying and powder metallurgy procedures were used to manufacture very fine-grained bulk material made from chips of the 2024 aluminum alloy. Studies of solution treatment and precipitation hardening of as-received material were based on differential scanning calorimetry (DSC) tests and TEM/STEM/EDX structural observations. Structural observations complemented by literature data lead to the conclusion that in the case of highly refined structure of commercial 2024 alloys prepared by severe plastic deformation, typical multi-step G-P-B →θ” →θ’ →θ precipitation mechanism accompanied with G-P-B →S” →S’ →S precipitation sequences result in skipping the formation of metastable phases and direct growth of the stable phases. Exothermic effects on DSC characteristics, which are reported for precipitation sequences in commercial materials, were found to be reduced with increased milling time. Moreover, prolonged milling of 2024 chips was found to shift the exothermic peak to lower temperature with respect to the material produced by means of common metallurgy methods. This effect was concluded to result from preferred heterogeneous nucleation of particles at subboundaries and grain boundaries, enhanced by the boundary diffusion in highly refined structures. Transmission electron microscopy and diffraction pattern analysis revealed the development of very fine Al4C3 particles that grow due to the chemical reaction between the Al matrix and graphite flakes introduced as a process control agent during the preliminary milling of chips. Al4C3 nano-particles are formed at high temperatures, i.e. during hot extrusion and the subsequent solution treatment of the samples. Highly refined insoluble particles such as aluminum carbide particles and aluminum oxides were found to retard recrystallization and reduce recovery processes during solution treatment of preliminarily milled materials. Therefore, the as-extruded material composed of a milled part and chip residuals retained its initial bimodal structure in spite of solution heat treatment procedures. This points to a high structural stability of the investigated materials, which is commonly required for new technologies of high-strength Al-based materials production.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 1; 169-176
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Necessary Thermodynamics Factors to Obtain Simple Solid Solutions in High-Entropy Alloys from the Al-Ti-Co-Ni-Fe System
    Autorzy:
    Górecki, K.
    Bała, P.
    Kozieł, T.
    Cios, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/356241.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    High-Entropy Alloys
    entropy
    enthalpy
    VEC
    solid solution
    Opis:
    In this paper findings regarding the design and synthesis of High-Entropy Alloys based on mixing enthalpy, mixing entropy, δ parameter, Ω parameter and valence electron concentration are presented. Four alloys were synthesised with different predicted crystalline structures. Results of the microstructure and crystal structure studies are presented. It was shown that predicted structures as well as complex intermetallic phases exist in the material. The validity of valence electron concentration as well as additional parameters such as mixing enthalpy, mixing entropy and others necessary to obtain only the solid solution in High-Entropy Alloys were examined.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 4; 2141-2145
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structures of Cu-based glass forming system doped with iron
    Autorzy:
    Kozieł, T.
    Latuch, J.
    Czeppe, T.
    Ratuszek, W.
    Cios, G.
    Zielińska-Lipiec, A.
    Bała, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1153737.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Kf
    81.05.Bx
    61.05.cp
    68.37.Hk
    Opis:
    The effects of iron additions on the structure of (Cu_{0.47}Ti_{0.34}Zr_{0.11}Ni_{0.08})_{100-x}Fe_{x} (x=0, 1.5, 3, 6) glass forming system are presented. The alloys were synthesized by arc melting of high purity elements and melt spun to form: rapidly quenched ribbons. X-ray diffraction studies showed the amorphous structure of the base and Fe-containing alloys, confirmed by the presence of exothermic peaks on differential scanning calorimetry curves. Bulk samples in the form of rods (Φ3×55 mm) were cast using a suction casting unit attached to the arc melter. Structural investigations revealed partial crystallization of the base Cu₄₇Ti₃₄Zr₁₁Ni₈ alloy. Iron additions significantly decreased the glass forming ability of the alloy, leading to primary crystallization of dendrites.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 913-915
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    X-ray diffraction and EBSD study of Al-Ti-Co-Ni-Fe high-entropy alloy
    Autorzy:
    Górecki, K.
    Bała, P.
    Cios, G.
    Stępień, M.
    Kozieł, T.
    Wieczerzak, K.
    Tokarski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1153214.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.30.-t
    61.05.C-
    68.37.Hk
    61.66.Dk
    Opis:
    Al₁₅Ti₂₀Co₂₀Ni₂₅Fe₂₀ alloy, synthesized in an arc furnace, was characterized by microscopic investigations, X-ray diffraction and electron backscatter diffraction techniques. Theoretical assumptions indicate a dual-phase crystal structure fcc+bcc. It was shown that dendrites and eutectic are bcc phase, and the interdendritic region is fcc phase.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 991-992
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Characterization Of Cast Fe-Cr-C Alloy
    Charakterystyka stopu Fe-Cr-C w stanie lanym
    Autorzy:
    Wieczerzak, K.
    Bała, P.
    Stępień, M.
    Cios, G.
    Kozieł, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/352071.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Fe-Cr-C alloy
    chromium carbides
    cast alloy
    segregation
    stop Fe-Cr-C
    węgliki chromu
    stop żeliwa
    segregacja
    Opis:
    The paper presents the results of the characterization of alloy from Fe-Cr-C (carbon content 0.79 wt.%) system including the microstructure, phase analysis, morphology and hardness in as cast state. The chemical composition was designed to create chromium-rich ferritic matrix with high volume fraction of carbides in form of interdendritic eutectics. The research was carried out on the cross section of the ingot, synthesized in an arc furnace under high purity argon atmosphere and crystallized on water-cooled copper mould. Microstructural characterization was carried out by light microscopy and scanning electron microscopy (SEM). Phase identification was performed by X-Ray diffraction (XRD). The microstructure of the investigated alloy is composed of primary and secondary dendrites Fe-Cr solid solution and complex M23C6 and M7C3 carbides in interdendritic areas. Segregation of Cr and C during crystallization causes precipitation of M7C3 carbides. The average hardness of the alloy is 205±12 HV10.
    W pracy dokonano analizy mikrostruktury, faz oraz wybranych właściwości stopu w stanie lanym z układu Fe-Cr-C (stężenie węgla 0,79% mas.). Skład chemiczny zaprojektowano tak, aby uzyskać osnowę ferrytyczną bogatą w chrom z dużym udziałem objętościowym węglików eutektycznych. Badania przeprowadzono na przekroju poprzecznym wlewka wykonanego w piecu łukowym w atmosferze ochronnej argonu, krystalizującego na miedzianym łożu, chłodzonym wodą. Obserwacje mikrostruktury przeprowadzono z wykorzystaniem mikroskopii świetlnej oraz skaningowej mikroskopii elektronowej (SEM). Identyfikację faz wykonano za pomocą rentgenowskiej analizy fazowej. Mikrostruktura badanego stopu składa się z dendrytów pierwszo i drugorzędowych roztworu stałego chromu w żelazie α oraz węglików złożonych M23C6 i M7C3, powstałych w obszarach międzydendrytycznych. Segregacja Cr i C podczas krystalizacji, sprzyja wydzielaniu węglików typu M7C3. Średnia twardość stopu wynosi 205±12 HV10.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2A; 779-782
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Zr Purity and Oxygen Content on the Structure and Mechanical Properties of Melt-Spun and Suction-Cast Cu46Zr42Al7Y5 Alloy
    Autorzy:
    Kozieł, T.
    Latuch, J.
    Cios, G.
    Bała, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/352353.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metallic glasses
    bulk metallic glasses
    melt spinning
    suction casting
    Opis:
    The effect of oxygen content in zirconium on the structure and mechanical properties of the Cu46Zr42Al7Y5 alloy, in the form of melt-spun ribbons and suction-cast rods, was investigated. Two types of Zr, rod and crystal bar of different nominal purities and oxygen contents, were used to synthesize the alloy by arc melting. Rapidly solidified ribbons were produced by melt spinning and their amorphous structures were confirmed by X-ray diffractometry (XRD) and differential scanning calorimetry (DSC). Bulk samples in the form of rods were cast using a special water-cooled suction casting unit attached to the arc melting system. XRD and DSC studies proved the amorphous structure of the bulk alloy synthesized from low-oxygen Zr and partial crystallization of the same alloy for high-oxygen Zr. In both bulk samples, uniformly distributed crystalline particles were identified as yttrium oxides. Higher mean compressive strength of amorphous alloy was observed. The hardness of amorphous phase was close to 500 HV1 in both bulk alloys, while the hardness of crystalline dendritic areas, observed in the alloy synthesized from high oxygen Zr, was lower by about 50 HV1.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2B; 1215-1219
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of long storage and soil type on the actual denitrification and denitrification capacity to N2O formation
    Autorzy:
    Wlodarczyk, T.
    Szarlip, P.
    Koziel, W.
    Nosalewicz, M.
    Brzezinska, M.
    Pazur, M.
    Urbanek, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/24513.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    long storage
    soil type
    soil respiration
    denitrification
    denitrification capacity
    nitrous oxide
    formation
    nitrate
    Opis:
    The actual denitrification to N 2 O and denitri- fication capacity to N 2 O after flooding of different soil samples stored for over 25 years in air-dry conditions and fresh, air dried samples were compared in our study. Zero N 2 O release was ob- served from the stored soils but the fresh soil samples had very low actual denitrification to N 2 O. NO 3 - addition significantly increased the amount of N 2 O (denitrification capacity to N 2 O) released after flooding, which depended on the length of storage and type of soils and was much higher in stored soils. Prolonged exposure of the soils to drought conditions caused a greater decrease in the Eh value compared with the fresh soil. The total cumulative release of N 2 O from the stored and fresh soils was correlated with the reduced NO 3 - and organic C content in soils enriched with NO 3 - . Some soils showed the capability of N 2 O consumption. CO 2 release depended on the length of storage and type of soils under flooding after pro- longed drought. On average, CO 2 release was higher from the stored rather than fresh soils. The organic C content in the stored soils was generally lower than in the fresh soils, probably due to the storage effect. The cumulative CO 2 release from the stored soils was well correlated with the organic C while no correlation was observed for the fresh soil samples.
    Źródło:
    International Agrophysics; 2014, 28, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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