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    Wyświetlanie 1-14 z 14
    Tytuł:
    The effect of ionizing radiation on vernalization, growth and development of winter wheat
    Autorzy:
    Czyczylo-Mysza, I.M.
    Marcinska, I.
    Jankowicz-Cieslak, J.
    Dubert, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/19063.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The effects of gamma irradiation on the vernalization requirements, growth and development of winter wheat grown in a rainout shelter were studied during two successive growing seasons. Dry grains of winter wheat cv. Kobra were irradiated with 300 Gy radiation from a cobalt 60 gamma irradiator. Treated and control grains were pregerminated and subjected to vernalization for 0, 42 or 54 days. Morphological parameters of the plants developing from irradiated seeds (M1 generation) and the plants grown from the seeds produced by the irradiated plants (M2 generation) were measured in order to track the studied effects over two generations. Irradiation of dry grains slowed the growth and development of the plants regardless of the temperature treatment. The measured yield structure elements appeared to be lower for irradiated plants, but no clear effect of radiation on vernalization requirements was noted.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2013, 55, 1
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphology and developmental potential of bovine parthenotes after spontaneous activation in vitro
    Autorzy:
    Lechniak, D
    Cieslak, D.
    Sosnowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2048294.pdf
    Data publikacji:
    1998
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    blastomere
    bovine oocyte
    cytogenetic analysis
    parthenogenetic activation
    morphology
    in vitro
    fertilization system
    blastocyst
    oocyte
    insemination
    morphological evaluation
    maturation
    embryo production
    Opis:
    Spontaneous parthenogenetic activation of bovine oocytes in an in vitro maturation and fertilization system (IVM/IVF) is described. Altogether, 1403 follicular oocytes, collected by the aspiration method, were matured in vitro and then cultured without insemination in the same conditions as a group of inseminated oocytes. After 48-72 h of additional culture, 141 oocytes (10%) were found to be spontaneously activated. Morphological evaluation revealed that the number of blastomeres within parthenotes ranged from 2 to 16 cells, with a minority (15.7%) comprising of 9-16 blastomeres. According to a cytogenetic analysis, only 1.2% of the analysed parthenotes consisted of more than 9 cells. Parthenotes may not be distinguished from embryos produced in vitro and spontaneous parthenogenetic activation in an IVM/IVF system indicates suboptimal culture conditions. A group of non-inseminated oocytes should be included in each experiment to serve as a control. Spontaneously activated bovine parthenotes only occasionaly developed beyond the 8-blastomere stage in a common IVM/IVF system. The incidence of parthenotes interferes with the efficiency of in vitro embryo production but it is doubtful whether it lowers the pregnancy rate after transfer of IVF embryos.
    Źródło:
    Journal of Applied Genetics; 1998, 39, 2; 193-198
    1234-1983
    Pojawia się w:
    Journal of Applied Genetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Matrix recording of assembly unit and assembly sequence
    Macierzowy zapis jednostki montażowej – ustalenie kolejności montażu
    Autorzy:
    Suszyński, M
    Żurek, J
    Cieślak, R
    Powiązania:
    https://bibliotekanauki.pl/articles/175926.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    matrix
    modelling of assembly sequence
    assembly sequence
    macierz
    modelowanie kolejności montażu
    kolejność montażu
    Opis:
    The article is an attempt to analyse matrix recording of the graph to find on assembly sequence. There has been presented the use of matrix of graphs and assembly states to model and find the assembly sequence, there has also been done short comparison of their most essential features. It has been proved, that appropriate matrix representation of the assembly unit, which is the basis of modern computer search algorithms should enable effectively to find a rational sequence of connecting its parts. There have been discussed examples of graph representation using an assembly states matrix and a graph matrix. There have been compared their possibilities in the area of finding assembly sequence leading to shortening time, and as a result limiting its costs.
    W pracy przedstawiono próbę analizy macierzowego zapisu grafu do wyznaczania kolejności montażu. Przedstawiono zastosowanie macierzy grafu i stanów montażu do modelowania i ustalania sekwencji montażu. Dokonano również krótkiego porównania najbardziej istotnych ich cech. Wykazano, że odpowiednia macierzowa reprezentacja jednostki montażowej, stanowiąca podstawę współczesnych komputerowych algorytmów przeszukiwania, powinna umożliwiać efektywne ustalenie racjonalnych kolejności łączenia jej części. Omówiono przykłady reprezentacji grafu za pomocą macierzy stanów montażu oraz macierzy grafu. Zestawiono także ich możliwości w zakresie ustalania kolejności montażu, prowadzące do skrócenia czasu i w konsekwencji ograniczające jego koszty.
    Źródło:
    Advances in Manufacturing Science and Technology; 2013, 37, 2; 71-78
    0137-4478
    Pojawia się w:
    Advances in Manufacturing Science and Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Development of Rapidly Solidified Magnesium – Copper Ribbons
    Autorzy:
    Pastuszak, M.
    Cieślak, G.
    Dobkowska, A.
    Mizera, J.
    Kurzydłowski, K. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/958209.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    magnesium-based alloys
    rapid solidification
    microstructure
    mechanical properties
    corrosion properties
    Opis:
    The aim of the present work was to plan and carry out an experiment consisting of amorphization of industrial magnesium alloy WE 43 (Mg - 4 Y - 3 RE - 0.5 Zr) modified by the copper addition. Investigated alloy modified with 20% of copper was rapidly quenched with the use of melt spinning technique. The effects of cooling rate on the structure and properties of the obtained material were extensively analyzed. The structure and phase analysis of samples were examined using X-ray diffraction method (XRD) while the thermal stability of the samples was determined by differential scanning calorimetry (DSC). Microstructure observations were also conducted. The microhardness tests (HV0.02) and corrosion resistance tests were carried out to investigate the properties of the material. Corrosion resistance measurements were held using a typical three-electrode system. As the result of the research, the effect of cooling rate on microstructure and properties of investigated alloy was determined.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2B; 1083-1088
    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:
    Sex-dependent differences in the effect of early weaning on the chosen hormones secretion in sheep during the postnatal transition to puberty – Preliminary results
    Autorzy:
    Cieslak, .
    Chmielewska, N.
    Romanowicz, K.
    Mlynarczuk, J.
    Wankowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087989.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The influence of early weaning on the cortisol, follicle-stimulating hormone (FSH), luteinizing hormone (LH) and growth hormone (GH) secretion in lambs of both sexes and testosterone (T4) level in male lambs during the postnatal transition to puberty was investigated by radioimmunoassay. It was hypothesized that this influence is long-term and sexually dimorphic. Hence, the effect of weaning at 5 weeks of age in comparison with the weaning at 9 weeks of age on hormone concentrations in peripheral blood plasma of 5-, 9-, 12-, and 16-week-old lambs of both sexes was investigated. The cortisol concentrations were greater (P<0.05) in control and early weaned female lambs than in male lambs at investigated stages. Weaning at 5 weeks of age resulted in the lover (P<0.05) cortisol secretion in male lambs in contrast to the greater (P<0.05) cortisol secretion in female lambs at 16 weeks of age. Weaning at 5 weeks of age stimulated (P<0.001) the FSH secretion, but reduced (P<0.001) the LH, GH and T4 secretion in 16-week-old male lambs. In female lambs early weaning inhibited (P<0.05) the FSH secretion at 9 weeks of age, LH secretion after 9 weeks of age and GH secretion after 12 weeks of age. Thus, early weaning results in the sexually dimorphic stress reaction that is more potent and long-lasting in female in contrast to male lambs. This maternal deprivation stress contributes to the inhibition of LH and GH secretion in lambs of both sexes and T4 secretion in male lambs during the postnatal transition to puberty.
    Źródło:
    Polish Journal of Veterinary Sciences; 2015, 18, 1
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    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:
    Kształtowanie mikrostruktury i właściwości mechanicznych brązów cynowych
    Shaping the Microstructure and Mechanical Properties of Tin Bronzes
    Autorzy:
    Rzadkosz, S.
    Kozana, J.
    Garbacz-Klempka, A.
    Piękoś, M.
    Cieślak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/381842.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    materiały innowacyjne
    innowacyjne technologie odlewnicze
    brązy cynowe
    miedź
    mikrostruktura
    właściwości mechaniczne
    innovative materials
    innovative technologies foundry
    tin bronzes
    copper
    microstructure
    mechanical properties
    Opis:
    W artykule zaprezentowano wyniki badań nad wybraną grupą stopów z układu Cu-Sn. Przeanalizowano oddziaływanie udziału cyny w brązach cynowych w zakresie od 6 do 30 %. Kontynuując badania zmierzające do uzyskania odpornych na zużycie brązów spoza grup znormalizowanych stopów miedzi, oceniono oddziaływanie dodatku aluminium w stopach Cu-Sn. Przeprowadzono badania metalograficzne zmierzające do określenia mechanizmów oddziaływania zmiennych zawartości dodatków stopowych z uwagi na zmiany podstawowych właściwości mechanicznych. Uzyskane wyniki wskazują na wyraźne zmiany mikrostruktur badanych stopów, jak również wykazują silne utwardzenie stopów Cu-Sn. Zastosowane dodatki aluminium w zakresie do 3 % w wybranych stopach powodują również poprawę właściwości mechanicznych badanych brązów cynowych z dodatkiem aluminium.
    During the research a chosen group of copper - tin alloys were investigated. The influence Sn in tin bronzes was analysed in the broad spectrum between 6 to 30%. Continuing the research aiming at obtaining durable bronzes outside the normalised copper alloys, the influence of chosen aluminium additive in selected Cu-Sn alloys was assessed. Metallographic tests were carried out to determine the operating mechanisms and also the influence of the varied alloying additives from the perspective of changes in the basic properties of the alloys investigated. The obtained results clearly point to the changes in microstructures and mechanical properties of the alloys investigated.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 4 spec.; 107-110
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Low genetic diversity of declining Viola uliginosa (Violaceae) at its southern range limits in Poland
    Autorzy:
    Paul, W.
    Cieslak, E.
    Ronikier, M.
    Migdalek, G.
    Slomka, A.
    Zabicka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/19351.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Viola uliginosa (bog violet) is a declining species throughout its range due to – mostly anthropogenic – drying out of the wet habitats it occupies. Using AFLP markers, we aimed to estimate the genetic diversity in Polish populations, that may give an insight into the situation of plant populations facing rapid loss of natural habitats. Bog violet from several dispersed Polish populations is generally characterized by very low genetic diversity (HT = 0.048), even lower than several other endangered violets; therefore, we suggest that it should preserve at least EN rank in the red lists/red data books. The mean gene diversity within all populations (HS) was much lower than gene diversity (GST) between populations (0.020 versus 0.583, respectively) which supports the prevalence of clonal propagation of the species (mainly by stolons) but may also point to some significance of autogamy in cleisto- and chasmogamous flowers. A high FST value and the Mantel test for all populations revealed significant isolation by distance. Geographically neighboring pairs of populations formed genetic clusters supported by all (in the case of two closest populations) or most statistical analyses applied. Special attention should be paid to the locus classicus of the species in Rząska, consisting of a small number of individuals, forming a genetically distinct group, revealing very low gene diversity (Hj = 0.009) and the longest genetic distance to the remaining populations. Our results can contribute to planning future protection measures for the species at this and other locations. Genetic structure of the studied populations suggests local affinities of populations but does not generally support hypothesized recent continuity of V. uliginosa range along the river valleys of southern Poland; this view may, however, be altered with widening of the scope of studied populations and chosen molecular markers.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2016, 58, 2
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on Technology of Alloyed Copper Casting
    Autorzy:
    Rzadkosz, S.
    Kranc, M.
    Garbacz-Klempka, A.
    Piękoś, M.
    Kozana, J.
    Cieślak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/380832.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    casting technology
    copper
    alloyed copper
    copper deoxidation
    heat treatment
    technologia odlewnicza
    miedź
    obróbka cieplna
    Opis:
    The work presents experiment results from the area of copper casting technology and chosen examples of alloyed copper. At present, copper casting technology is applied in many branches of industrial manufacturing, especially in the sector of construction, communications, arms and power engineering. Alloyed copper, containing slight additions of different elements and having special physio-chemical properties, is used in a special range of applications. Copper technology and alloyed copper analyses have been presented, these materials being used for cast manufacturing for power engineering. The quality of casts has been assessed, based on their microstructure analysis, chemical content and the cast properties. During the research, special deoxidizing and modifying agents were applied for copper and chosen examples of alloyed copper; also exemplary samples were tested with the help of metallographic analysis, electrical conductivity and gaseous impurities research.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 2; 79-84
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    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:
    The use of activated carbons for removing organic matter from groundwater
    Zastosowanie pylistych węgli aktywnych do usuwania materii organicznej z wody podziemnej
    Autorzy:
    Kaleta, J.
    Kida, M.
    Koszelnik, P.
    Papciak, D.
    Puszkarewicz, A.
    Tchórzewska-Cieślak, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/205458.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    groundwater
    powdery activated carbon
    granular activated carbon
    organic matter
    biosorption
    woda gruntowa
    pylisty węgiel aktywny
    granulowany węgiel aktywny
    materia organiczna
    biosorpcja
    Opis:
    The article presents research results of the introduction of powdery activated carbon to the existing technological system of the groundwater treatment stations in a laboratory, pilot plant and technical scale. The aim of the research was to reduce the content of organic compounds found in the treated water, which create toxic organic chlorine compounds (THM) after disinfection with chlorine. Nine types of powdery active carbons were tested in laboratory scale. The top two were selected for further study. Pilot plant scale research was carried out for the filter model using CWZ-30 and Norit Sa Super carbon. Reduction of the organic matter in relation to the existing content in the treated water reached about 30%. Research in technical scale using CWZ-30 carbon showed a lesser efficiency with respect to laboratory and pilot-plant scale studies. The organic matter decreased by 15%. Since filtration is the last process before the individual disinfection, an alternative solution is proposed, i.e. the second stage of filtration with a granular activated carbon bed, operating in combined sorption and biodegradation processes. The results of tests carried out in pilot scale were fully satisfactory with the effectiveness of 70–100%.
    W artykule przedstawiono wyniki badań w skali laboratoryjnej, półtechnicznej i technicznej nad wprowadzeniem do istniejącego układu technologicznego stacji uzdatniania wody podziemnej, pylistego węgla aktywnego. Celem badań było obniżenie zawartości występujących w wodzie uzdatnionej związków organicznych, które po procesie dezynfekcji chlorem tworzą toksyczne związki chloroorganiczne (THM). W skali laboratoryjnej przebadano 9 rodzajów pylistych węgli aktywnych, z których dwa najlepsze wytypowano do dalszych badań. Badania w skali półtechnicznej realizowano na filtrze modelowym z zastosowaniem węgli: CWZ-30 i Norit Sa Super. Obniżenie materii organicznej w stosunku do jej dotychczasowej zawartości w wodzie uzdatnionej wynosiło ok.30%. Badania w skali technicznej z zastosowaniem węgla CWZ-30 wykazały nieco mniejszą skuteczność w odniesieniu do badań laboratoryjnych i badań w skali półtechnicznej. Obniżenie zawartości materii organicznej wyniosło ok. 15%. Ponieważ ostatnim procesem jednostkowym przed dezynfekcją jest filtracja, zaproponowano alternatywne rozwiązanie – drugi stopień filtracji ze złożem granulowanego węgla aktywnego, pracującego w połączonych procesach sorpcji i biodegradacji. Rezultaty badań zrealizowanych w skali półtechnicznej były w pełni zadowalające – skuteczność 70–100%.
    Źródło:
    Archives of Environmental Protection; 2017, 43, 3; 32-41
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Copper and Arsenical Copper During Eneolithic in Metallographic and Mechanical Properties Examination
    Autorzy:
    Garbacz-Klempka, A.
    Kozana, J.
    Piękoś, M.
    Cieślak, W.
    Perek-Nowak, M.
    Kowalski, Ł.
    Adamczak, K.
    Łoś, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/382382.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nondestructive testing
    copper
    arsenical copper
    archaeometallurgy
    casting
    metallographic properties
    Eneolith
    badania nieniszczące
    miedź
    archeometalurgia
    odlewnictwo
    właściwości metalograficzne
    epoka miedzi
    Opis:
    Arsenical copper has been used since 5th millennium cal.BC, later exchanged by application of Cu-Sn alloys in metallurgy. This work presents the results of metallographic and mechanical properties studies performed on two flat axes connected with local Eneolithic societies (4500-3000 cal.BC). The axes are one of the oldest metal artifacts from Polish land. Originally they were made from Cu-As alloy, and their chemical composition was established by X-ray fluorescence spectroscopy (XRF). Their microstructure was analysed using optical microscopy (OM) and scanning electron microscopy conducted with energy-dispersive X-ray spectroscopy (SEM-EDS). The macrostructure analysis (OM) of the axes was performed as well. On the basis of the results, the alloys used in the Eneolithic to cast the axes were reproduced in lab. In order to achieve the characteristics of the alloys, their mechanical properties including ultimate tensile strenght (UTS), hardness (HB), microhardness (HV0,1) and ductility were examined. The solidification process was studied by means of thermal analysis.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 4 spec.; 23-28
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computer Simulation of the Formation of Non-Metallic Precipitates During a Continuous Casting of Steel
    Autorzy:
    Kalisz, D.
    Żak, P. L.
    Tokarski, T.
    Wzorek, Ł.
    Suchy, J. S.
    Kiczor, M.
    Cieślak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/958226.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    non-metallic oxide precipitates
    modelling
    continuous casting of steel
    crystallization
    Opis:
    The authors own computer software, based on the Ueshima mathematical model with taking into account the back diffusion, determined from the Wołczyński equation, was developed for simulation calculations. The applied calculation procedure allowed to determine the chemical composition of the non-metallic phase in steel deoxidised by means of Mn, Si and Al, at the given cooling rate. The calculation results were confirmed by the analysis of samples taken from the determined areas of the cast ingot. This indicates that the developed computer software can be applied for designing the steel casting process of the strictly determined chemical composition and for obtaining the required non-metallic precipitates.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 1; 335-340
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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