Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Fe phases" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-10 z 10
    Tytuł:
    Application of Natural and Artificial Ageing on Multiply Remelted AlSi9Cu3 Alloy
    Autorzy:
    Matejka, M.
    Bolibruchova, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/382708.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    remelting
    Fe phases
    artificial ageing
    natural ageing
    eutectic silicon
    przetapianie
    fazy Fe
    sztuczne starzenie
    naturalne starzenie
    krzem eutektyczny
    Opis:
    This article focuses on the study of the influence of remelting and subsequent natural and artificial ageing on the structure of recycled AlSi9Cu3 alloy with increased iron content. The assessed changes in eutectic silicon and iron-based intermetallic phases were carried out using optical and scanning electron microscopy. The degradation of the eutectic silicon morphology due to remelting occurred only at the highest numbers of remelting. The effect of remelting the investigated alloy, which is accompanied by a gradual increase in wt. % Fe, began to manifest significantly through a change in the length of the ferric phases after the fourth remelting. As expected, the artificial ageing process has proven to be more effective than natural ageing. It has led to a change in the eutectic silicon morphology and has been beneficial in reducing the lengths of adverse ferric phases. The use of alloys with higher numbers of remelting, or with greater “contamination”, for the manufacture of shape-challenging castings is possible when using a suitable method of eliminating the negative factors of the remelting process. The results of our investigation show a suitable method of the above elimination the application of heat treatment T5 – via artificial ageing.
    Źródło:
    Archives of Foundry Engineering; 2019, 2; 60-66
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A study on the Surface Roughness of Galvannealed Low Carbon Al-Killed and Ti-Nb Stabilized Interstitial Free Steels
    Autorzy:
    Elkoca, Sen Candan
    Ekmekci, Bulent
    Elkoca, Oktay
    Powiązania:
    https://bibliotekanauki.pl/articles/2049358.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    galvannealing
    galvannealed steel
    hot-dip galvanizing
    Fe-Zn phases
    surface roughness
    Opis:
    In this study, the surface roughness of galvannealed low carbon Al-killed and Ti-Nb stabilized interstitial free steels was investigated using the industrial galvannealing process parameters. The iron content of the coatings was also analysed to establish a relationship with the surface roughness and coating composition. The surface roughness displayed an exponential behaviour with increasing of annealing time at each annealing temperature in both steel coatings, which was in an increasing order in the galvannealed low carbon Al-killed steel coating, whereas it was a reverse order in the galvannealed Ti-Nb stabilized interstitial free steel coating. The craters were observed on the galvannealed coatings resulting in high surface roughness. Increasing the iron content of the coatings leads to a reduction in the surface roughness with δ1k phase.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 3; 841-857
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Valences and site characteristics of iron in radioactive magmatic veins (Egypt): A Mössbauer and chemical study
    Autorzy:
    Hassan, K. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2086544.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    Egypt
    Mössbauer
    peralkaline rocks
    aegirine-augite
    Fe-oxide phases
    radioactive/rare metals
    Opis:
    Radioactive veins in shear zones of the El-Seboah granite in Egypt with anomalous concentrations of Nd, Ce, Zr, Y, Nb, Sm, Th and U were studied by petrographic microscopy, x-ray diffraction, 57Fe Mössbauer and wet chemical methods. The veins are composed essentially of quartz, aegirine-augite and minor K-feldspar ± α-iron oxide (hematite) ± γ-iron oxide hydroxide (goethite). They likely represent late-stage felsic melt that was quenched and devitrified at high temperature to yield crystals and crystallites, and then subjected to low temperature alteration during which most of the K feldspar transformed to kaolinite and opal. Mössbauer parameters of the samples indicate that the existing Fe-bearing minerals are primary, with appreciable ordering in the Fe sites. The bulk-sample iron (ΣFe) contents are extremely high (12.3-22.4%). The extent of oxidation of the Fe has been found to be 100% by Mössbauer spectroscopy and 95.36-99.69% by a chemical method. These conditions of Fe enrichment and strong oxidation suggest that the veins are extreme differentiates of granite magmas where high states of oxygen fugacity prevailed.
    Źródło:
    Mineralogia; 2010, 41, 1/2; 23--33
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Valences and site characteristics of iron in radioactive magmatic veins (Egypt): A Mössbauer and chemical study
    Autorzy:
    Hassan, Kamaleldin M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2086502.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    Egypt
    Mössbauer
    peralkaline rocks
    aegirine-augite
    Fe-oxide phases
    radioactive/rare metals
    Opis:
    Radioactive veins in shear zones of the El-Seboah granite in Egypt with anomalous concentrations of Nd, Ce, Zr, Y, Nb, Sm, Th and U were studied by petrographic microscopy, x-ray diffraction, 57Fe Mössbauer and wet chemical methods. The veins are composed essentially of quartz, aegirine-augite and minor K-feldspar ± α-iron oxide (hematite) ± γ-iron oxide hydroxide (goethite). They likely represent late-stage felsic melt that was quenched and devitrified at high temperature to yield crystals and crystallites, and then subjected to low temperature alteration during which most of the K feldspar transformed to kaolinite and opal. Mössbauer parameters of the samples indicate that the existing Fe-bearing minerals are primary, with appreciable ordering in the Fe sites. The bulk-sample iron (ΣFe) contents are extremely high (12.3-22.4%). The extent of oxidation of the Fe has been found to be 100% by Mössbauer spectroscopy and 95.36-99.69% by a chemical method. These conditions of Fe enrichment and strong oxidation suggest that the veins are extreme differentiates of granite magmas where high states of oxygen fugacity prevailed.
    Źródło:
    Mineralogia; 2010, 41, 1/2; 23--33
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determining the optimal solution treatment temperature of aluminum cast alloys by using quantitative analysis
    Autorzy:
    Kucharikova, L.
    Tillova, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/109049.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    aluminum cast alloys
    quantitative analysis
    microstructural features
    eutectic Si
    Fe-rich phases
    Cu-rich phases
    stopy aluminium
    odlewnicze stopy aluminium
    cechy mikrostrukturalne
    analiza ilościowa
    Opis:
    Heat treatment of aluminum casts is necessary for achieving the desired properties of casts. Heat treatment caused changes in microstructure and substructure of materials and therefore it is necessary to control which changes are sufficient and which are insufficient. Morphology (shape, size and distribution) of microstructural features influence the properties of cast rapidly. Contribution describes influence of the heat treatment marking T4 - solution treatment in dependence on temperature (505, 515 a 525 °C) and holding time (2, 4, 8, 16 a 32 hour) on structure (α–phase, eutectic silicon, intermetallic phases) and mechanical properties (ultimate tensile strength - UTS and Brinell hardness - HBW) of A226 cast alloy. This cast alloy is made out of secondary aluminum. Secondary aluminum alloys are made of aluminum scrap. About 70 % of such material are used in the manufacture of casts. Therefore the strictly microstructure control of experimental material before and after heat treatment is necessary for declaration of cast properties. Nowadays manufacturers use the methods of quantitative analysis for quick control of microstructural features. This work present some of them.
    Źródło:
    Archiwum Wiedzy Inżynierskiej; 2017, 2, 2; 27-30
    2544-2449
    Pojawia się w:
    Archiwum Wiedzy Inżynierskiej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental Investigation Of Modified Heat Treatment Of AK64-Type Al-Si-Cu Sand Cast Alloy
    Eksperymentalne badania zmodyfikowanej obróbki cieplnej odlewu piaskowego ze stopu Al-Si-Cu typu AK64
    Autorzy:
    Cupido, L. H.
    Żak, P. L.
    Mahomed, N.
    Lelito, J.
    Piwowarski, G.
    Krajewski, P. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/355727.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminium Al-Si-Cu cast alloy
    T6 heat treatment
    nucleation temperature
    Al2Cu and Al-Fe-Si phases
    aluminium Al-Si-Cu odlewane ze stopu
    obróbka cieplna T6
    temperatura zarodkowania
    fazy Al2Cu i Al-Fe-Si
    Opis:
    An experimental investigation was conducted to observe and analyze the microstructural evolution of phases present in the AK64 Al-Si-Cu alloy subjected to a modified T6 heat treatment (HT). The AK64 alloy1 is the Polish alternative of the A319.0 ASM standard aluminium alloy. The modified T6 HT schedule with a higher temperature and shorter duration was applied in the solutioning process and lower quenching and higher artificial ageing temperature than the prescribed by the ASM standard were used. The cooling curves registered during the liberating of overheating and solidifying processes give important information on nucleation temperatures for the Al dendrite network, Al-Si eutectic reaction and precipitation of Cu-rich phases. Comparison of the as-cast and heat treated microstructures revealed predicted microstructural changes and also partial fragmentation of the Fe-rich phases was observed after the application of the modified HT programme.
    Artykuł poświęcony jest obróbce cieplnej stopu AK64, który jest odpowiednikiem stopu ASM: A319.0. W badaniach zastosowano zmodyfikowaną obróbkę cieplną T6 o podwyższonej (w stosunku do procedury T6 HT – ASM) temperaturze wyżarzania i skróconym czasie starzenia naturalnego po przesyceniu w wodzie. Obserwacje struktury stopu po obróbce cieplnej wykazały dużą zgodność ze strukturami przewidzianymi na podstawie przeprowadzonych symulacji numerycznych. Dodatkowo określono wartości temperatury odpowiadającej początkowi zarodkowania fazy α(Al), reakcji eutektycznej Al-Si oraz wydzielania z roztworu fazy bogatej w Cu. Opisano również częściową fragmentację fazy zawierającej Fe, będącą następstwem zastosowanej zmodyfikowanej obróbki cieplnej.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 3; 2397-2402
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diffusive and Displacive Phase Transformations in Nanocomposites under High Pressure Torsion
    Autorzy:
    Straumal, B.
    Kilmametov, A.
    Gornakova, A.
    Mazilkin, A.
    Baretzky, B.
    Korneva, A.
    Zięba, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/356575.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high-pressure torsion
    Ti-Fe alloys
    phase transitions
    high-pressure phases
    Opis:
    The high-pressure torsion (HPT) of Ti-Fe alloys with different iron content has been studied at 7 GPa, 5 anvil rotations and rotation speed of 1 rpm. The alloys have been annealed before HPT in such a way that they contained different amounts of α/α' and β phases. In turn, the β phase contained different concentration of iron. The 5 anvil rotations correspond to the HPT steady-state and to the dynamic equilibrium between formation and annihilation of microstructure defects. HPT leads to the transformation of initial α/α' and β-phases into mixture of α and high-pressure ω-phase. The α → ω and β → ω phase transformations are martensitic, and certain orientation relationships exist between α and ω as well as β and ω phases. However, the composition of ω-phase is the same in all samples after HPT and does not depend on the composition of β-phase (which is different in different initial samples). Therefore, the martensitic (diffusionless) transformations are combined with a certain HPT-driven mass-transfer. We observed also that the structure and properties of phases (namely, α-Ti and ω-Ti) in the Ti – 2.2 wt. % Fe and Ti – 4 wt. % Fe alloys after HPT are equifinal and do not depend on the structure and properties of initial α'-Ti and β-Ti before HPT.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 2; 457-465
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ordering process in Fe-Al28Cr5 alloys studied by Mössbauer spectroscopy
    Autorzy:
    Hanc-Kuczkowska, A.
    Kansy, J.
    Deniszczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/147348.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    Fe-Al28Cr5 alloys
    formation of D03 phases
    Mössbauer spectroscopy
    Opis:
    In the paper, studies of ternary Fe-Al28Cr5 alloys directed to characterization of mechanisms of the formation of ordered intermetallic phases influencing the possibilities of their practical application are shown. Also, a role of chromium as a modifier in kinetics of the formation of ordered phases is determined. Among the research method used, Mössbauer spectroscopy for the determination of hyperfine structure parameters was adopted. These parameters, sensitive to changes in spin and charge electron densities in the nearest neighbourhood of a Mössbauer isotope nucleus, caused by specific configurations of atoms, are directly connected with the degree of ordering of a compound. Spectral analysis has been carried out using the authors' software developed based on a theoretical model relating the shape of a Mössbauer spectrum to the sample microstructure. It has been shown that Mössbauer spectroscopy enables quantitative evaluation of the degree of ordering of phases occurring in samples characterized by large graining, in the case of which it is not possible to determine the long-range order parameter by X-ray diffraction.
    Źródło:
    Nukleonika; 2013, 58, 1; 67-71
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correlation Between Structure, Microstructure and Dielectric Properties of Bi7Fe3Ti3O21 Ceramics Obtained in Different Conditions
    Autorzy:
    Szalbot, D.
    Bartkowska, J. A.
    Feliksik, K.
    Bara, M.
    Chrunik, M.
    Adamczyk-Habrajska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/356042.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    multiferroic materials
    Aurivillius phases
    Bi7Fe3Ti3O21
    dielectric properties
    Opis:
    Multiferroic six-layer Aurivillius type Bi7Fe3Ti3O21 ceramics was obtained by conventional mixed oxides method. The final sintering process was taken in several different sintering times, which determined changes in properties of discussed ceramic material. The structure and dielectric properties of the material are reported. In order to examine the technological conditions on the crystal structure, XRD analysis was carried out. The microstructure, as well as the quantitative and qualitative analysis of the chemical composition were investigated by scanning electron microscope with an energy dispersion spectrometer. The main purpose of the paper is to present the effect of sintering time on the microstructure, crystallographic structure and dielectric properties of Bi7Fe3Ti3O21 ceramics.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 2; 879-884
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    D-gun Sprayed Fe-Al Single Particle Solidification
    Krystalizacja pojedynczej cząstki Fe-Al naniesionej metodą detonacyjną
    Autorzy:
    Wołczyński, W.
    Senderowski, C.
    Morgiel, J.
    Garzeł, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/352240.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Fe-Al coating
    Ni-20Cr interlayer
    rapid solidification
    D-gun spraying
    boron localization
    competitive growth of phases
    powłoki FeAl
    międzywarstwy Ni-20Cr
    szybkie krzepnięcie
    metoda detonacyjna
    lokalizacja boru
    proces wzrostu faz
    Opis:
    Some Fe-Al particles less than 50 μm in diameter were deposited onto the steel substrate by means of the D-gun spraying. A solidification mechanism of an individual particle is described. The particle subjected to the description contained nominally 63 at.% Al. The description was preceded by the TEM / SAED analysis of both the Fe-Al coating and Ni-20Cr interlayer. The whole number of the analyzed particles was partially melted during the deposition. The solidification products like: amorphous phase sub-layer, oscillatory sub-layer which contains two types lamellae distributed alternately and typically non-equilibrium phase sub-layer were revealed. In the micro scale, solidification was considered as a process which occurred in two directions: towards the substrate and towards the non-melted particle part. Both solidification processes underwent the positive thermal gradients. The boron addition was localized within the eutectic precipitates pushed and then rejected by the solid/liquid interface of the solidifying non-equilibrium phase. The proposed model is a general one and therefore can be applied to other systems ;description.
    Cząstki proszku Fe-Al niniejsze niż 50 μm w średnicy zostały osadzone detonacyjnie na podłożu stalowym. Opisuje się mechanizm krystalizacji pojedynczej cząstki. Cząstki poddane opisowi zawierały nominalnie 63 aL% Al. Opis poprzedzono badaniami struktury metodą TEM / SAED dotyczącymi zarówno powłoki Fe-Al jak i między warstwy Ni-20Cr. Wszystkie analizowane cząstki były częściowo nadtopione podczas osadzania. Zidentyfikowano produkty krystalizacji takie jak: podwarstwę amorficzną, podwarstwę oscylacyjną zawierającą periodycznie ułożone pły tki dwu faz oraz podwarstwę zawierającą fazę typowo nierównowagową. W mikroskali proces wzrostu faz jest analizowany jako zachodzący w dwu kierunkach: w stronę podłoża i w stronę niestopionej części cząstki. Obydwa procesy wzrostu zachodziły w obecności dodatniego gradientu temperatury. Bor dodany do powłoki został zlokalizowany w eutektyce odepchniętej przez front krystalizacji fazy typowo nierównowagowej. Proponowany model ma charakter ogólny i może być zastosowany do opisu innych systemów.
    Źródło:
    Archives of Metallurgy and Materials; 2014, 59, 1; 211-220
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies