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    Wyświetlanie 1-14 z 14
    Tytuł:
    Corrosion Behavior of FeAl and Fe3Al Based Fe-Al-C Alloys in Sulfuric Acid
    Autorzy:
    Silva, A. P.
    Brito, P. P.
    Martins, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/2134209.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    iron aluminides
    microstructure
    mechanical properties
    corrosion resistance
    Opis:
    Iron aluminides are iron-aluminum alloys that have excellent resistance to oxidation at high temperatures with low density, high resistance/weight ratio and a low manufacturing cost. Due to its characteristics, these alloys are presented as an option to replace stainless steels in certain applications. This works intends report the casting process and subsequent analyses involving microstructure, mechanical properties, and corrosion resistance of two Fe-Al-C alloys (Fe-11wt%Al and Fe-25wt%Al, containing 0.31-0.37%C), which were prepared in an induction furnace and poured in a permanent mold. Samples of these alloys were characterized and presented elevated hardness values of 37 HRC (alloy Fe-11wt%Al) and 49.6HRC (alloy Fe-25wt%Al) and microstructure with aluminides type Fe3Al and FeAl and also carbides type K. The Fe-11wt%Al alloy exhibited superior resistance to uniform corrosion, although both Fe-Al-C alloys exhibited significantly higher corrosion rates compared to a binary iron aluminide in 0.5M H2SO4 containing naturally dissolved oxygen.
    Źródło:
    Archives of Foundry Engineering; 2022, 22, 2; 77--82
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tribological properties of the Fe-Al intermetallic alloys after annealing
    Autorzy:
    Garbala, K.
    Patejuk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382068.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    intermetallics alloy
    Fe3Al
    tribological test
    wear surface
    weight loss
    stop intermetaliczny
    test tribologiczny
    zużycie powierzchni
    ubytek masy
    Opis:
    In paper researching results of tribological proprieties Fe3Al intermetallic alloys after annealing are presented. Studies were conducted in the following environments: a water; an air and oil. For investigation purposes the tribotester pin-on-disk type with the contrsample made of steel 40H quenched and tempered was used. Tests were carried out with the following process parameters: pressure p = 2MPa and linear velocity (circuital) V = 0.46m/s. It was noted, that intermetallic samples with the small distinction in chemical compositions, annealed at different temperatures showed a large difference in the quantity of material loss in the all tested environments. Appropriately selected parameters of the intermetallic alloys annealing, provide their greater resistance to abrasion in the air and oil environments than in the case of steel.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 2 spec.; 43-46
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badanie właściwości tribologicznych intermetali
    Investigation of tribological properties of the intermetallics alloys
    Autorzy:
    Jasionowski, R.
    Bryll, K.
    Grabian, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/382942.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    intermetal
    stop Fe-Al
    faza międzymetaliczna
    zużycie cierne
    właściwości tribologiczne
    intermetallics alloy
    Fe-Al alloy
    intermetallic phase
    wear abrasive
    tribological properties
    Opis:
    W pracy przedstawiono wyniki badań właściwości tribologicznych wybranych intermetali w warunkach tarcia suchego. Określono wartość zużycia masowego badanych materiałów i żeliwnej przeciwpróbki. Przeprowadzono analizę mikroskopową zmian stanu powierzchni w celu identyfikacji mechanizmów zniszczenia intermetali.
    The paper presents tribological tests results of the selected intermetallics alloys in the conditions of dry friction . Tribological properties of the intermetallics alloys was investigated by mass wear. The microscopic examinations of the samples of intermetallics alloys in order to identify mechanisms of destruction have been determined.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 1s; 87-90
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Meta-stable solidification created by the detonation method of coating formation
    Autorzy:
    Wołczyński, W.
    Garzeł, G.
    Morgiel, J.
    Senderowski, C.
    Pawłowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382812.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    krystalizacja
    krzepnięcie szybkie
    powłoka Fe-Al
    faza amorficzna
    theory of crystallization
    rapid solidification process
    Fe-Al coating
    meta-stable phase diagram
    amorphous phase
    Opis:
    Particles of the Fe-Al type (less than 50 m in diameter) were sprayed onto the 045 steel substrate by means of the detonation method. The TEM, SAED and EDX analyses revealed that the Fe-Al particles have been partially melted in the experiment of coating formation. Particle undergone melting even within about 80% of its volume. Therefore, solidification of the melted part of particles was expected. Solidification differed significantly due to a large range of chemical composition of applied particles (from 15 at.% Al up to 63 at.% Al). A single particle containing 63 at.% Al was subjected to the detailed analysis, only. The TEM / SAED techniques revealed in the solidified part of particle three sub-layers: an amorphous phase, [...] , periodically situated FeAl + Fe2Al5 phases, and a non-equilibrium phase, [...]. A hypothesis dealing with the inter-metallic phases formation in such a single particle of the nominal composition No = 0.63 is presented. At first, the solid / liquid system is treated as an interconnection: substrate / liquid / nonmelted particle part . Therefore, it is suggested that the solidification occurs simultaneously in two directions: towards a substrate and towards a non-melted part of particle. The solidification mechanism is referred to the Fe-Al meta-stable phase diagram. It is shown that the melted part of particle solidifies rapidly according to the phase diagram of meta-stable equilibrium and at a significant deviation from the thermodynamic equilibrium.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 2; 93-96
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of annealing time and temperature on the Fe3Al intermetallic alloys microstructure modification
    Autorzy:
    Garbala, K.
    Patejuk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380040.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    intermetallic alloy
    Fe3Al phase
    microstructure modification
    stop międzymetaliczny
    faza Fe3Al
    modyfikacja mikrostruktury
    Opis:
    There is an industry interesting in intermetallic alloys in recent years. There are widely possibilities to adopt this kind of materials for structural units. More expensive materials can be replaced by them. A property which limits their wider application is the low plasticity at environment and elevated temperatures. In paper the results of the thermal microstructure modification are shown. To this end, the influence of annealing time and temperature on the intermetallic phase Fe3Al grain size was investigated. The impact of these factors on micro-hardness was examined as well. It was found that these operations cause the grain size reduction and the micro-hardness decrease.
    Źródło:
    Archives of Foundry Engineering; 2011, 11, 2 spec.; 39-42
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Granulation of Cu-Al-Fe-Ni Bronze
    Autorzy:
    Pisarek, B. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/381371.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technologies
    innovative materials
    aluminium bronze
    granulation
    sieve analysis
    microstructure
    microhardness
    innowacyjne technologie odlewnicze
    materiały innowacyjne
    analiza sitowa
    mikrostruktury
    mikrotwardość
    Opis:
    With the increase in wall thickness of the casting of iron-nickel-aluminium-bronze, by the reduction of the cooling rate the size of &κII phase precipitates increases. This process, in the case of complex aluminium bronzes with additions of Cr, Mo and W is increased. Crystallization of big κII phase, during slow cooling of the casting, reduces the concentration of additives introduced to the bronze matrix and hardness. Undertaken research to develop technology of thick-walled products (g> 6 mm) of complex aluminium bronzes. Particular attention was paid to the metallurgy of granules. As a result, a large cooling speed of the alloy, and also high-speed solidification casting a light weight of the granules allows: to avoid micro-and macrosegregation, decreasing the particle size, increase the dispersion of phases in multiphase alloys. Depending on the size granules as possible is to provide finished products with a wall thickness greater than 6 mm by infiltration of liquid alloy of granules (composites). Preliminary studies was conducted using drip method granulate of CuAl10Fe5Ni5 bronze melted in a INDUTHERM-VC 500 D Vacuum Pressure Casting Machine. This bronze is a starting alloy for the preparation of the complex aluminium bronzes with additions of Cr, Mo, W and C or Si. Optimizations of granulation process was carried out. As the process control parameters taken a casting temperature t (°C) and the path h (mm) of free-fall of the metal droplets in the surrounding atmosphere before it is intensively cooled in a container of water. The granulate was subjected to a sieve analysis. For the objective function was assume maximize of the product of Um*n, the percentage weight "Um" and the quantity of granules 'n' in the mesh fraction...
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 3; 61-66
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Model of Cu-Al-Fe-Ni bronze crystallization
    Autorzy:
    Pisarek, B. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/383278.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    theoretical basis
    foundry proces
    thermal analysis
    derivative analysis
    microstructure
    Cu-Al-Fe-Ni bronze
    model of crystallization
    podstawy teoretyczne
    proces odlewniczy
    analiza termiczna
    analiza derywacyjna
    mikrostruktura
    brąz Cu-Al-Fe-Ni
    model krystalizacji
    Opis:
    According to the analysis of the current state of the knowledge shows that there is little information on the process of phase transformations that occur during the cooling Cu-Al-Fe-Ni hypo-eutectoid bronzes with additions of Cr, Mo and/or W, made additions individually or together, for the determination of: the type of crystallizing phases, crystallizing phases, order and place of their nucleation. On the basis of recorded using thermal and derivative analysis of thermal effects phases crystallization or their systems, analysis of the microstructure formed during crystallization - observed on the metallographic specimen casting ATD10-PŁ probe, analysis of the existing phase equilibrium diagrams forming elements tested Cu-Al-Fe-Ni bronze, with additions of Cr, Mo, W and/or Si developed an original model of crystallization and phase transformation in the solid state, the casting of high quality Cu-Al-Fe-Ni bronze comprising: crystallizing type phase, crystallizing phase sequence, place of nucleation.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 3; 72-79
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of annealing time for quenching CuAl7Fe5Ni5W2Si2 bronze on the microstructure and mechanical properties
    Autorzy:
    Pisarek, B. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/382884.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjne technologie odlewnicze
    innowacyjne materiały odlewnicze
    wyżarzanie
    hartowanie
    właściwości mechaniczne
    brąz Al-Fe-Ni-W-Si
    innovative foundry technologies
    innovative foundry material
    annealing
    quenching
    microstructure
    mechanical properties
    Al-Fe-Ni-W-Si bronze
    Opis:
    This paper presents the influence of annealing time 30, 60 and 120 min at 1000 C for quenching CuAl7Fe5Ni5W2Si2 bronze in 10% water solution of NaCl, on the microstructure and mechanical properties. The presented results concern the species newly developed aluminum-iron-nickel bronze, with additions W and Si. In order to determine changes in the microstructure of the hardened bronze metallographic studies were performed on cylindrical samples of diameter 10 mm, on the metallographic microscope with digital image analysis, X-ray phase analysis, EDX point with the digital recording on the computer. Specified percentage of the microstructure of martensite and bainite, participation of proeutectoid \alfa phase in the microstructure, grain size of former \beta phase, the amount of dissolved \kappa phase. It was found that in the microstructure of bronze in the cast state, there are a number of intermetallic phases of \kappa type. At interphase boundaries of primary intermetallic faceted precipitates, especially rich in tungsten (IM_W), nucleate and grow dendritic primary intermetallic [...] phases, with chemical composition similar to the type of Fe3Si iron silicide. Dissolved, during the heating, in the \beta phase are all the intermediate phase included in the microstructure, with the exception of primary intermetallic phases of tungsten and [...]. Prolongation of the isothermal annealing causes coagulation and coalescence of primary phases. In microstructure of the bronze after quenching obtained the \alfa phase precipitation on the grain boundary of secondary \beta phase, coarse bainite and martensite, for all annealing times. With the change of annealing time are changed the relative proportions of individual phases or their systems, in the microstructure. In the microstructure of bronze, hold at temperature of 1000 C for 60 min, after quenching martensitic microstructure was obtained with the primary phases, and the least amount of bainite.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 2; 187-204
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural Characterization of Rapidly Solidified Al71Ni24Fe5 Alloy
    Autorzy:
    Młynarek, Katarzyna
    Czeppe, T.
    Babilas, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079835.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    solidification process
    mechanism of crystallization
    rapid solidification
    quasicrystalline structure
    aluminium alloys
    proces krzepnięcia
    mechanizm krystalizacji
    szybkie krzepnięcie
    struktura quasikrystaliczna
    stopy aluminium
    Opis:
    The influence of rapid solidification from the liquid state on the structure of Al71Ni24Fe5 alloy was studied. The samples were prepared by induction melting (ingots) and high pressure die casting into a copper mold (plates). The structure was examined by X-ray diffraction (XRD), light microscopy and high resolution transmission electron microscopy (HRTEM). The mechanism of crystallization was described on the basis of differential scanning calorimetry (DSC) heating and cooling curves, XRD patterns, isothermal section of Al-Ni-Fe alloys at 850°C and binary phase diagram of Al-Ni alloys. The fragmentation of the structure was observed for rapidly solidified alloy in a form of plates. Additionally, the presence of decagonal quasicrystalline phase D-Al70.83Fe9.83Ni19.34 was confirmed by phase analysis of XRD patterns, Fast Fourier Transform (FFT) and Inverse Fast Fourier Transform (IFFT) of transmission electron microscopy images. The metastable character of D-Al70.83Fe9.83Ni19.34 phase was observed because of the lack of thermal effects on the DSC curves. The article indicates the differences with other research works and bring up to date the knowledge about Al71Ni24Fe5 alloys produced by two different cooling rates.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 3; 90--95
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamic Assessment of Mushy Zone in Directional Solidification
    Autorzy:
    Mikołajczak, P.
    Ratke, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/380005.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminum alloy
    directional solidification
    mushy zone
    CALPHAD technique
    Fe intermetallics
    β-Al5FeSi
    stop aluminium
    krzepnięcie kierunkowe
    strefa półciekła
    technika CALPHAD
    Opis:
    Solidification of AlSiFe alloys was studied using a directional solidification facility and the CALPHAD technique was applied to calculate phase diagrams and to predict occurring phases. The specimens solidified by electromagnetic stirring showed segregation across, and the measured chemical compositions were transferred into phase diagrams. The ternary phase diagrams presented different solidification paths caused by segregation in each selected specimen. The property diagrams showed modification in the sequence and precipitation temperature of the phases. It is proposed in the study to use thermodynamic calculations with Thermo-Calc which enables us to visualize the mushy zone in directional solidification. 2D maps based on property diagrams show a mushy zone with a liquid channel in the AlSi7Fe1.0 specimen center, where significant mass fraction (33%) of β-Al5FeSi phases may precipitate before α-Al dendrites form. Otherwise liquid channel occurred almost empty of β in AlSi7Fe0.5 specimen and completely without β in AlSi9Fe0.2. The property diagrams revealed also possible formation of α–Al8Fe2Si phases.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 4; 101-109
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Materials Properties of Iron-rich Intermetallic Phase in a Multicomponent Aluminium-Silicon Alloy
    Autorzy:
    Tupaj, M.
    Orłowicz, A. W.
    Mróz, M.
    Trytek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/381828.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    alloys Al-Si
    intermetallics phase
    Fe-rich
    primary crystals
    silicon
    stopy Al-Si
    faza międzymetaliczna
    wzbogacanie żelazem
    kryształy pierwotne
    krzem
    Opis:
    Available technical literature includes a number of reports on harmful effects connected with elevated content of iron in aluminium-silicon alloys but in case of pressure castings, alloys containing up to 2% Fe can be used. This follows from lesser susceptibility of such alloys to sticking to surfaces of metal moulds. One effect of iron presence in aluminium-silicon alloys is precipitation of iron-rich intermetallic phases. In the study reported in this paper it has been found that in a multicomponent aluminium-silicon alloy, the indentation hardness (HIT) and the elastic indentation modulus (EIT) of intermetallic phases occurring in the form of polyhedrons and/or their conglomerates, rich in aluminium, iron, silicon, manganese, and chromium, containing also copper, nickel, and vanadium, are higher than those measured for silicon crystals. This feature can be used to intentional modelling microstructure of mechanical parts which are expected to show high resistance to abrasive wear.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1 spec.; 111-114
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Different Mn/Fe Ratio on Microstructure Alloy Based on Al-Si-Mg
    Autorzy:
    Bolibruchova, D.
    Ivanova, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/383021.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    AlSiMg alloys
    manganese
    intermetallic phases
    microstructure
    stopy AlSiMg
    mangan
    fazy międzymetaliczne
    mikrostruktura
    Opis:
    This article deals with the effect of manganese that is the most applied element to eliminate the negative effect of iron in the investigated alloy AlSi7Mg0.3. In this time are several methods that are used for elimination harmful effect of iron. The most used method is elimination by applying the additive elements, so-called iron correctors. The influence of manganese on the morphology of excluded iron-based intermetallic phases was analysed at various iron contents (0.4; 0.8 and 1.2 wt. %). The effect of manganese was assessed in additions of 0.1; 0.2; 0.4 and 0.6 wt. % Mn. The morphology of iron intermetallic phases was assessed using electron microscopy (SEM) and EDX analysis. The increase of iron content in investigated alloys caused the formation of more intermetallic phases and this effect has been more significant with higher concentrations of manganese. The measurements carried out also showed that alloys with the same Mn/Fe ratio can manifest different structures and characteristics of excluded iron-based intermetallic phases, which might, at the same time, be related to different resulting mechanical properties.
    Źródło:
    Archives of Foundry Engineering; 2019, 3; 15-20
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Maximum Piston Velocity on Internal Homogeneity of AlSi9Cu3(Fe) Alloy Processed by High-Pressure Die Casting
    Autorzy:
    Matejka, Marek
    Bolibruchowá, Dana
    Podprocká, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2203939.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Al-Si-Cu alloy
    high-pressure die casting
    porosity
    Brinell hardness
    microstructure
    stop Al-Si-Cu
    odlewanie wysokociśnieniowe
    porowatość
    twardość Brinella
    mikrostruktura
    Opis:
    High-pressure die casting results in a high quality surface and good mechanical properties of castings. Under the effect of pressure, integral and solid castings are achieved without a large number of foundry defects. The correct and proper setting of technological parameters plays a very important role in minimizing casting defects. The aim of the presented article is to determine the optimum maximum piston velocity for a casting in the high-pressure casting process with two height variants, depending on their internal quality. It is because the internal quality of particular castings is important in terms of proper functionality in operations where the biggest problem is the porosity of the casting. The main cause of porosity formation is the decreasing solubility of gases (most often hydrogen) during the melt solidification. Solubility represents the maximum amount of gas that can dissolve in a metal under equilibrium conditions of temperature and pressure. Macroporosity and microporosity were determined from the sections of the surfaces in the determined zones of the castings. Here, the results was that the macroporosity decreased with increasing piston velocity. Ideal microstructure was evaluated at a piston velocity of 3 m/s for both types of castings. On the other hand, the increase in tube size has shown that velocities of 3 m/s and higher, the tube is more prone to macroporosity formation. The highest hardness was achieved at the piston velocity of 2 m/s at both tube lengths.
    Źródło:
    Archives of Foundry Engineering; 2022, 22, 4; 34--40
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    X-ray tomography investigation of Fe-rich intermetallics in AlSi alloys
    Autorzy:
    Mikołajczak, P.
    Ratke, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/381463.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminum alloy
    intermetallics
    β-Al5FeSi
    X-ray tomography
    melt flow
    stop aluminium
    związek międzymetaliczny
    tomografia rentgenowska
    szybkość przepływu
    Opis:
    Iron exists as a common impurity element in AlSi foundry alloys. The main consequence of the presence or adding of iron to AlSi alloys is the formation Fe-rich intermetallics with especially deleterious β-Al5FeSi. This work aims to identify the role of fluid flow on the microstructure and intermetallics in Al-9 wt.% Si-0.2/0.5/1.0 wt.% Fe alloys directionally solidified under defined thermal and fluid flow conditions and extensively uses 3D x-ray tomography to get a better insight into their morphology and formation. The results have revealed the growth of larger and more dense β-Al5FeSi intermetallics in the specimen centre as an effect of forced flow. The reconstructions confirmed that the course of number density at the specimen cross section increases from the specimen edge to its centre.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 4; 79-82
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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