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    Wyświetlanie 1-7 z 7
    Tytuł:
    Novel Method of Thermal Conductivity Measurement Using Stefan-Boltzmann Law
    Autorzy:
    Leśniewski, W.
    Czekaj, E.
    Wieliczko, P.
    Wawrylak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/356312.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thermal conductivity
    thermal radiation
    ceramic shell mold
    aluminum casting
    Opis:
    The article presents a novel method that allows measurement of thermal conductivity that is based on Stefan-Boltzmann law. The developed method can be used to determine thermal conductivity of ceramic investment casting molds. The methodology for conducting thermal conductivity tests of ceramic material samples is presented. Knowledge of the value of thermal capacity and thermal conductivity as a function of temperature enables computer simulations of the process of cooling and solidification of liquid metal in a mold.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 1; 311-315
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development and manufacturing of casting technology for crawler vehicle suspension used in wetlands
    Autorzy:
    Małysza, M.
    Kowalski, P.
    Wańczyk, K.
    Gil, A.
    Dziedzic, S.
    Żuczek, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/391844.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
    Tematy:
    CAx
    computer simulations
    Flow3D
    Ansys
    casting technology
    3D printing
    aluminum casting
    Opis:
    The modern designing techniques and development procedures requires the use of advanced integrated methods. That kind of approach requires the involvement of series of steps which leads to the logical work stream known as Integrated Computational Material Engineering. The steps involve the design and evaluation process in the virtual environment of CAD/CAE and simulation software. The use of simulation software allows for online optimization of the shape and properties of designed part. The publication presents a design and manufacturing process of a component of the larger assembly of the chassis of heavy-duty machine. Established methodology includes the analysis of the initial geometry of the part of the heavy vehicle used in difficult wetland environmental conditions.
    Źródło:
    Prace Instytutu Odlewnictwa; 2017, 57, 4; 351-356
    1899-2439
    Pojawia się w:
    Prace Instytutu Odlewnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reducing Melt Surface Turbulence by Employing Surge and Filter in a Conventional Non-Pressurizing Gating System: Simulation and Experiment
    Autorzy:
    Baghani, Amir
    Kheirabi, Ali
    Bahmani, Ahmad
    Khalilpour, Hamid
    Powiązania:
    https://bibliotekanauki.pl/articles/2049678.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminum casting
    filter
    surge
    oxide bifilms
    failure analysis
    Weibull module
    mold filling simulation
    Opis:
    Tensile strength of aluminum castings has been improved by employing surge and filter in a conventional non-pressurizing gating system. For this purpose, three non-pressurizing bottom-gating systems were designed where the first design was a simple design with no filter and no surge, in the second design filter and in the third one surge was added to the end of runner. Tensile strength, Weibull module, scanning electron microscopy, chemical analysis, and melt pattern during the mold filling were thoroughly analyzed to compare these three designs. it was observed that employing filter and surge in the gating system reduces flow kinetic energy and consequently avoid surface turbulence and air entrainment, which leads to castings with fewer defects and higher reliabilities. Finally, it found that appropriate use of surge in the running system can be as effective as employing a filter in reducing melt front velocity.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 2; 397-405
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multi Response Optimization of the Functional Properties of Rubber Seed – Shear Butter Based Core Oil Using D-Optimal Mixture Design
    Autorzy:
    Onyekwere, O. S.
    Odiakaose, C.
    Uyanga, K. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/381034.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    core oil
    rubber seed oil
    shea butter
    aluminum casting
    rdzeń olejowy
    olej kauczukowy
    masło shea
    odlewanie aluminium
    Opis:
    In this study, rubber seed/shea butter oil was used to formulate core oil. The formulated core oil was characterised. D-optimal mixture design was used for multi response optimisation of the functional properties of rubber seed-shea butter coil oil. Desirable values for some responses might be obtained from a factor combination while for others responses not so desirable values. Through multiple response optimisations, a factor setting that gives the desirable values for all responses was obtained. The selected optimum mixture setting for the formulated core oil is 65.937% Rubber seed and 34.063% Shea butter oil at desirability of 0.924. Under the optimum condition the functional properties of the core oil was found to be 39.57KN/M2, 626.85KN/M2, 36.63KN/M2, 593.906KN/M2, 412.605 and 167.309s for Green Compressive Strength, Dry Compressive Strength, Green Tensile Strength, Dry Tensile Strength, Permeability and Collapsibility respectively. The optimum conditions were validated with less than 0.2% error. The functional properties of the formulated core oil was compared to the functional properties of linseed core oil. It was found that rubber seed-shea butter core oil can be used for producing cores suitable for Aluminium casting.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 4; 207-223
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of Flux Structure for Processing of Aluminium Casting Production Wastes
    Autorzy:
    Turakhodjaev, N. D.
    Tursunov, T. K.
    Yakubov, L. E.
    Abdurakhmanov, K. Z.
    Turakhodjaeva, S. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/382195.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminum casting
    flux
    melting temperature
    burn off loss
    mechanical properties
    impurities
    odlewanie aluminium
    topnik
    temperatura topnienia
    właściwości mechaniczne
    zanieczyszczenia
    Opis:
    The objective of research is to define aluminium and its production wastes melting modes in electric unit while applying protective fluxes layer. This article cites the results of researches on development of flux structure for melting of aluminium production wastes. Melting unit diagram and results of research defining aluminium production wastes melting temperature regime are exemplified. Modes of metal charging, heating-up and melting of aluminium and its production wastes are exemplified for the electric unit with movable upper and immovable lower electrodes. The article describes the results of researches and recommendations that smelting chamber temperature to be maintained in the range of 1000-1100 °С, with melting zone temperature at 1400-1500 °С. It is recommended that charging of production wastes slag was carried after flux melt and reached 700-750 °С. Tables cite fluxes compositions that allow conducting aluminium melting process in various units. In the conclusion it is stated that application of a corresponding design of melting unit in aggregate with graphite electrodes and protective fluxes provides: - reduction of irretrievable metal burn-off losses; - savings on energy expenditures; - quality upgrade of liquid smelt due to decrease of oxide inclusions and occluded gas concentration.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 3 spec.; 91-94
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Particle Filtration in Aluminium Alloy
    Autorzy:
    Baumann, Benedict
    Keßler, A.
    Hoppach, E.
    Wolf, G.
    Szucki, M.
    Hilger, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079833.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    aluminum casting
    filtration
    particle movement
    castings defects
    non-metallic inclusions
    simulation
    odlewy aluminiowe
    filtrowanie
    ruchy cząstek
    wady odlewów
    wtrącenia niemetaliczne
    Opis:
    The objective of this work is to gain a deeper understanding of the separation effects and particle movement during filtration of non-metallic inclusions in aluminum casting on a macroscopic level. To understand particle movement, complex simulations are performed using Flow 3D. One focus is the influence of the filter position in the casting system with regard to filtration efficiency. For this purpose, a real filter geometry is scanned with computed tomography (CT) and integrated into the simulation as an STL file. This allows the filtration processes of particles to be represented as realistically as possible. The models provide a look inside the casting system and the flow conditions before, in, and after the filter, which cannot be mapped in real casting tests. In the second part of this work, the casting models used in the simulation are replicated and cast in real casting trials. In order to gain further knowledge about filtration and particle movement, non-metallic particles are added to the melt and then separated by a filter. These particles are then detected in the filter by metallographic analysis. The numerical simulations of particle movement in an aluminum melt during filtration, give predictions in reasonable agreement with experimental measurements.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 3; 70-80
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Taguchi-Grey Relational Analysis of Gating System Design on Mechanical Properties of Casting
    Autorzy:
    Ingle, P. D.
    Narkhede, B. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/383260.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mechanical properties
    gating system design
    aluminum casting
    Taguchi technique
    Grey Relational Analysis
    GRA
    właściwości mechaniczne
    stopy aluminium
    techniki Taguchi
    Gray Relational Analysis
    Opis:
    Throughout the casting process, mold filling plays a very significant role in the casting quality control. It is important to study the effect of gating system design on ingate velocity of the metal which affects the mechanical properties of casting. The effect of varying the design of four gating system elements namely pouring cup, sprue height, runner and ingate design on the multiple responses like tensile strength and percentage elongation is studied using a Taguchi’s L9 OA. The Taguchi technique was coupled with a Grey Relational Analysis (GRA) to obtain a Grey Relational Grade (GRG) for evaluating multiple responses. ANOVA has been applied to identify the significance of different parameters and it was found that the pouring cup design and the runner cross-section along its length collectively contributed above 76% of the total GRG value. Finally, the confirmation tests were performed to validate the predicted optimized results and it established an improvement of 9.90% from the initial design.
    Źródło:
    Archives of Foundry Engineering; 2019, 3; 72-77
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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