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Wyświetlanie 1-15 z 15
Tytuł:
Analysis of the Stability Selected Properties of Polymeric Binder on the Example of an Aqueous Solution of the Modified Starches
Autorzy:
Kaczmarska, K.
Grabowska, B.
Drożyński, D.
Łątka, P.
Powiązania:
https://bibliotekanauki.pl/articles/379627.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative foundry materials
polymeric binders
starch derivative
stability
innowacyjne materiały odlewnicze
spoiwa polimerowe
pochodna skrobi
stabilność
Opis:
The aim of this study was to determine the stability of the physicochemical properties of foundry binders based on modified starch. On the basis analysis of structural changes (FT-IR), thermal characteristics (TG / DSC), were conducted an initial assessment of the stability of the binder during the 3-month duration of the measurement cycle. Additionally, there were studied the strength of moulding sand bonded by starch binder prepared at the beginning of the test cycle and starch binder after 3-month storage period.
Źródło:
Archives of Foundry Engineering; 2014, 14, 3 spec.; 25-30
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza wpływu warunków odprowadzania ciepła z formy na przebieg krystalizacji żeliwa o podwyższonej zawartości Si
Analysis of the Effect of Heat Removal from the Mould to the Crystallization of Cast Iron with High Si Content
Autorzy:
Stawarz, M.
Gromczyk, M.
Kondracki, M.
Szajnar, J.
Powiązania:
https://bibliotekanauki.pl/articles/382892.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
żeliwo wysokokrzemowe
analiza termiczno-derywacyjna
krystalizacja
fazy międzymetaliczne
high silicon cast iron
thermal derivative analysis
crystallization
intermetallic phases
Opis:
Żeliwo krzemowe z uwagi na wysoką odporność chemiczną, która stanowi kluczową zaletę tego materiału, przez długi czas nie posiadało większej konkurencji i cieszyło się dużą popularnością na rynku materiałów metalowych ze względu na niewielką cenę. Niestety produkcja odlewów z tego materiału wymaga szczególnej uwagi i ostrożności, co stanowi barierę dla odlewni [1]. W artykule zaprezentowano wyniki badań związanych z procesem krystalizacji żeliwa wysokokrzemowego przeprowadzonych w oparciu o analizę termiczno derywacyjną (wyznaczono temperatury charakterystyczne procesu krystalizacji analizowanego stopu, posiłkując się odpowiednim fragmentem wykresu układu równowagi fazowej Fe – Si oraz analizą procesu w oparciu o obliczenia z wykorzystaniem programu Thermo – Calc) oraz analizę metalograficzną mikrostruktury.
Silicon cast iron with high chemical resistance, which is the biggest advantage of this material, did not have any competition for a long time. It was popular on the market of metal materials because of its low price. However, the production of this material requires special attention and precautions, which is a barrier for foundry [1]. The article presents the results of research of high silicon cast iron crystallization based on thermal derivative analysis (have been identified characteristic temperatures of the investigated alloy crystallization process basis on the part of Fe – Si phase diagram and process analysis using calculations made in Thermo – Calc software) and metallographic analysis of the structure.
Źródło:
Archives of Foundry Engineering; 2014, 14, 4 spec.; 119-122
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of thermo-derivative analysis conditions on microstructure of the Al-Si-Cu alloy
Autorzy:
Dobrzański, L. A.
Krupiński, M.
Labisz, K.
Rdzawski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/380745.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminium alloy
thermo derivative analysis
UMSA
alloy microstructure
mechanical properties
stop aluminium
analiza termopochodna
mikrostruktura stopu
właściwości mechaniczne
Opis:
Microstructure change of the metals and alloys as a result of variable crystallisation conditions also by mind of cooling rate change influence the mechanical properties. In this work there are presented the interdependences between the cooling rate, chemical composition and microstructure of the cast aluminium alloy Al–Si–Cu as a result of the thermo-derivative analysis, using the UMSA (Universal Metallurgical Simulator and Analyzer) device. An important tool for the microstructure evaluation of the Al type AC-AlSi7Cu3Mg alloy was the light and electron scanning microscopy technique.
Źródło:
Archives of Foundry Engineering; 2011, 11, 2 spec.; 19-22
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of T6 heat treatment on mechanical properties and microstructure of EN AB-42000 alloy modified with strontium
Autorzy:
Pezda, J.
Powiązania:
https://bibliotekanauki.pl/articles/381247.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
alloy modification
heat treatment
thermal derivative analysis
mechanical properties
modyfikacja stopu
obróbka termiczna
analiza termiczna
analiza derywacyjna
właściwości mechaniczne
Opis:
Process of silumin properties perfection in scope of classic (simple and cheap) methods is connected with change of morphology of silumin precipitations through: process of alloy modification, maintaining suitable temperature of superheating treatment and pouring into moulds, as well as perfection of heat treatment operations. In the paper are presented results of a tests aimed at investigation of an effects of performed heat treatment operations on change of tensile strength of EN AC-42000 silumin modified with strontium. Investigated alloy was melted in electric resistance furnace. Course of crystallization process was recorded with use of thermal-derivative analysis (ATD), and on base of this analysis one determined temperatures range of heat treatment operations of the alloy. Performed heat treatment operation resulted in change of mechanical properties (Rm, A5) of the investigated alloy, whereas performed tests enabled determination of temperature and duration of solutioning and ageing treatments, which condition improvement of its mechanical properties.
Źródło:
Archives of Foundry Engineering; 2011, 11, 2 spec.; 169-174
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Heat Removal from the Casting Mould on the Crystallization High Silicon Cast Iron
Autorzy:
Stawarz, M.
Gromczyk, M.
Szajnar, J.
Powiązania:
https://bibliotekanauki.pl/articles/382988.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thermal derivative analysis
intermetallic phase
high silicon cast iron
crystallization process
analiza termiczno-derywacyjna
faza międzymetaliczna
żeliwo wysokokrzemowe
proces krystalizacji
Opis:
Silicon cast iron with high chemical resistance, which is the biggest advantage of this material, did not have any competition for a long time. It was popular on the market of metal materials because of its low price. However, the production of this material requires special attention and precautions, which is a barrier for foundry. The article presents the results of research of high silicon cast iron crystallization based on thermal derivative analysis (which has identified characteristic temperatures of the investigated alloy crystallization process basis on the part of Fe–Si phase diagram and process analysis using calculations made in Thermo–Calc software) and metallographic analysis of the structure.
Źródło:
Archives of Foundry Engineering; 2015, 15, 2 spec.; 83-86
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crystallization Process of Silicon Molybdenum Cast Iron
Autorzy:
Stawarz, M.
Powiązania:
https://bibliotekanauki.pl/articles/379482.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
theory of crystallization
metallographic analysis
molybdenum carbide
thermal derivative analysis
SiMo
teoria krystalizacji
analiza metalograficzna
węglik molibdenu
analiza termiczna
analiza derywacyjna
Opis:
The article presents results of studies of silicon – molybdenum cast iron (4.42% Si, 2.59% Mo and 2.48% C wt.-%) crystallization process. Metallographic analysis was carried out using SEM-scanning electron microscopy with the EDS system. In order to determine the phase composition, X-ray diffraction studies were performed. Thermo-Calc, a computer simulation program, was used to simulate the crystallization process. . The obtained data allowed to describe the effect of some elements on the crystallization process. The silicon phase of MnSi could not be identified during metallographic studies. Also, computer simulation of the crystallization process did not answer the question at which point the silicon phase of MnSi crystallizes in the tested alloy. Therefore, not all results obtained were linked to the registered crystallization process (TDA process). The EDS analysis revealed an unusual distribution of molybdenum in the microstructure of the sample, where it is clearly visible that the area enriched with this element is also the separation of spheroidal graphite. The possibility of occurrence of Mo-rich micro-areas found in graphite is considered. The case is debatable and difficult to resolve at this stage. Perhaps, at such a high concentration of molybdenum (2.59% Mo) in the alloy, conditions are created for simultaneously crystallization of graphite and molybdenum phases.
Źródło:
Archives of Foundry Engineering; 2018, 18, 2; 100-104
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Thermal Stability of Intermetallic Phases Precipitates in Continuous Ingots of AlCu4MgSi Alloy
Autorzy:
Nuckowski, P. M.
Kondracki, M.
Wróbel, T.
Powiązania:
https://bibliotekanauki.pl/articles/382300.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminium alloys
phase analysis
high temperature X-ray diffraction
thermal-derivative analysis
stopy aluminium
analiza fazowa
wysokotemperaturowa dyfrakcja rentgenowska
analiza termopochodna
Opis:
The article presents the results of research concerning to AlCu4MgSi alloy ingots produced using horizontal continuous casting process. The presented research was focused on the precise determination of phase composition of the precipitates formed during the solidification of ingots and the analysis of their thermal stability. In order to assess the morphology of precipitates in the AlCu4MgSi alloy, data obtained by using a computer simulation of thermodynamic phenomena were compiled with results obtained using advanced research techniques, i.e. High-temperature X-ray diffraction (HT-XRD), SEM-EDS, Thermal and derivative analysis (TDA) and Glow discharge optical emission spectroscopy (GD OES). SEM observations and analysis of chemical composition in micro-areas showed that the precipitates are mainly intermetallic θ-Al2Cu and β-Mg2Si phases, and also presence of Al19Fe4MnSi2 intermetallic phase was confirmed by X-ray diffraction studies. Based on the prepared Thermo-Calc simulation data, high-temperature X-ray diffraction measurements were conducted.
Źródło:
Archives of Foundry Engineering; 2019, 4; 99-104
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Final Inoculation on the Metallurgical Quality of Nodular Cast Iron
Autorzy:
Dwulat, Rafał
Janerka, K.
Grzesiak, K.
Powiązania:
https://bibliotekanauki.pl/articles/2079809.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nodular cast iron
inoculation of cast iron
thermal derivative analysis
properties of cast iron
żeliwo sferoidalne
modyfikacja żeliwa
analiza termiczna
właściwości żeliwa
Opis:
The article presents the results of research on the physicochemical and mechanical properties, microstructure, and the tendency to form shrinkage of nodular cast iron depending on the type of inoculant used for secondary inoculation. Six different inoculants containing different active elements in their chemical composition were used for the research. Step castings and Y2 wedges were made on the vertical forming line using an automatic pouring machine. The inoculation in the amount of 0.2% was made using a pneumatic dispenser equipped with a vision system controlling the effectiveness of the inoculation. The results of the thermal analysis were determined and compared, and the potential of each of the inoculants was assessed.
Źródło:
Archives of Foundry Engineering; 2021, 21, 4; 5-14
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure and properties of new ecological copper alloys for fittings
Autorzy:
Juszczyk, B.
Kulasa, J.
Cwolek, B.
Malec, W.
Wierzbicki, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/380157.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innovative casting material
innovative casting technology
ecological brass
thermal derivative analysis
innowacyjny materiał odlewniczy
innowacyjna technologia odlewnicza
mosiądz ekologiczny
analiza termiczna
analiza derywacyjna
Opis:
The article presents the results of studies concerning the selection of the chemical composition of the new ecological copper alloys for fittings. It was analyzed, among other things, the impact of the content of bismuth, aluminum, iron and boron. Their solidification process was characterized on the grounds of thermal and derivative analysis (TDA). Also the microstructure and mechanical properties were analyzed. Casting properties were determined by the castability spiral test. It was found that zinc is an essential component of the tested group of alloys, determining the course of their crystallization, phase composition and microstructure. There was no significant effect from the other elements on the course of crystallization. The obtained results revealed that bismuth is the element of the strongest impact on the castability changes. The formulated alloys surpass the commonly used standardized alloy intended for components of fittings, namely MO59, in terms of casting and mechanical (hardness) properties.
Źródło:
Archives of Foundry Engineering; 2011, 11, 3 spec.; 97-102
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Verification of the Cast Iron Solidification Model
Autorzy:
Mendakiewicz, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/2174627.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
foundry industry
application of information technology
solidification process
numerical techniques
thermal analysis
derivative analysis
przemysł odlewniczy
zastosowanie technologii informatycznych
krzepnięcie
techniki numeryczne
analiza termiczna
Opis:
The article concerns the experimental verification of the numerical model simulating the solidification and cooling processes proceeding in the domain of cast iron casting. The approximate course of the function describing the evolution of latent heat and the value of substitute specific heat resulting from its course were obtained using the thermal and derivative analysis (TDA) method The TDA was also used to measure the cooling curves at the distinguished points of the casting. The results obtained in this way were compared with the calculated cooling curves at the same points. At the stage of numerical computations, the explicit scheme of the finite difference method was applied. The agreement between the measured and calculated cooling curves is fully satisfactory.
Źródło:
Archives of Foundry Engineering; 2022, 22, 3; 91--94
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of the Thermal Conductivity Coefficient in the Heat Conduction Model with Fractional Derivative
Autorzy:
Brociek, R.
Słota, D.
Powiązania:
https://bibliotekanauki.pl/articles/382791.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heat conduction equation
thermal conductivity coefficient
inverse problem
fractional derivative
thermal conductivity
model przewodzenia ciepła
współczynnik przewodzenia ciepła
problem odwrotny
pochodna ułamkowa
przewodność termiczna
Opis:
Main goal of the paper is to present the algorithm serving to solve the heat conduction inverse problem. Authors consider the heat conduction equation with the Riemann-Liouville fractional derivative and with the second and third kind boundary conditions. This type of model with fractional derivative can be used for modelling the heat conduction in porous media. Authors deal with the heat conduction inverse problem, which, in this case, consists in identifying an unknown thermal conductivity coefficient. Measurements of temperature, in selected point of the region, are the input data for investigated inverse problem. Basing on this information, a functional describing the error of approximate solution is created. Minimizing of this functional is necessary to solve the inverse problem. In the presented approach the Ant Colony Optimization (ACO) algorithm is used for minimization.
Źródło:
Archives of Foundry Engineering; 2019, 3; 38-42
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal-Derivative Analysis and Precipitation Hardening of the Hypoeutectic Al-Si-Cu Alloys
Autorzy:
Smolarczyk, P. E.
Krupiński, M.
Powiązania:
https://bibliotekanauki.pl/articles/947571.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
thermal-derivative analysis
heat treatment
hardness
metallographic analysis
Al-Si-Cu alloys
analiza termiczna
analiza derywacyjna
obróbka cieplna
twardość
analiza metalograficzna
stop Al-Si-Cu
Opis:
The research focused on the influence of the solution temperature on the structure of precipitation hardening multi-component hypoeutectic aluminium alloys. The AlSi8Cu3 and AlSi6Cu4 alloys were used in the study and were subjected to a thermal-derivative analysis. The chemical composition and crystallization of phases and eutectics shift the characteristic points and the corresponding temperatures to other values, which affect to, for instance, the solution temperature. The alloys were supersaturated at 475°C (according to the determined temperature (TSol) and 505°C for 1.5 hours. Aging was performed at 180°C for 5 hours. The Rockwell hardness measurement, metallographic analysis of alloys by means of light microscopy as well as chemical and phase analysis using scanning electron microscopy and X-ray crystallography were carried out on alloys. The use of computer image analysis enabled the determination of the amount of the current Al2Cu phase in the alloys before and after heat treatment.
Źródło:
Archives of Foundry Engineering; 2019, 1; 41-46
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of the remelting on transformations in Co-Cr-Mo prosthetics alloy
Autorzy:
Kacprzyk, B.
Szymczak, T.
Gumienny, G.
Klimek, L.
Powiązania:
https://bibliotekanauki.pl/articles/382914.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
theory of crystallization
remelting
thermal analysis
derivative analysis
microstructure
composition
alloys properties
prosthetics alloys
teoria krystalizacji
przetapianie
analiza termiczna
analiza derywacyjna
mikrostruktura
właściwości stopu
stop protetyczny
Opis:
In the article we were studing the impact of the remelting on transformations in Co-Cr-Mo prosthetics alloy. The TDA curves were analyzed, the microstructure was examined, the analysis of the chemical composition and hardness using the Brinell method was made. It was found that the obtained microstructure of the alloys that we studied do not differ significantly. In all four samples, microscopic images were similar to each other. The volume, size and distribution of the phases remain similar. Analysis of the chemical composition showed that all the samples fall within the compositions provided for the test alloy. Further to this the hardness of the samples, regardless of the number of remeltings did not show any significant fluctuations and remained within the error limit. After analyzing all the results, it can be concluded that the remeltings of the alloys should not have a significant impact on their properties. Secondarily melted alloys can be used for prosthetics works.
Źródło:
Archives of Foundry Engineering; 2013, 13, 3; 47-50
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza zmian strukturalnych w spoiwie skrobiowym sieciowanym na drodze fizycznej
Analysis of Structural Changes in the Starch-Based Binder Cross-Linked by Physical Agents
Autorzy:
Kaczmarska, K.
Grabowska, B.
Powiązania:
https://bibliotekanauki.pl/articles/381948.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
innowacyjny materiał odlewniczy
innowacyjna technologia odlewnicza
spoiwo polimerowe
modyfikat skrobiowy
sieciowanie
spektroskopia FT-IR
innovative foundry material
innovative foundry technology
polymer binder
starch derivative
crosslinking
spectroscopy FT-IR
Opis:
W pracy przedstawiono analizę widm FT-IR dla spoiwa polimerowego na bazie modyfikatu skrobiowego. Widma zarejestrowano dla spoiwa przed i po usieciowaniu. Sieciowanie prowadzono na drodze fizycznej w podwyższonej temperaturze oraz w polu mikrofal. Na podstawie otrzymanych widm FT-IR stwierdzono, że podczas działania czynników fizycznych dochodzi do procesu odparowania wody rozpuszczalnikowej oraz powstawania międzycząsteczkowych sieciujących wiązań wodorowych. Zaobserwowano, że w warunkach otoczenia również następuje powolne odparowanie rozpuszczalnika, jak też tworzenie się mostków wodorowych.
The paper presents an analysis of FT-IR spectra for the polymeric binder based on a starch derivative. Spectra were recorded for the binder before and after cross-linking. Cross-linking was carried out by physical means at elevated temperature and under microwave irradiation. On the basis of FT-IR spectra, it was found the evaporation of solvent (water) and the formation of cross-linking intermolecular hydrogen bonds were occurred after the use of physical factors. It was observed that under ambient conditions the solvent was evaporated (in slow process of evaporation), and formation of hydrogen bridges was also occurred.
Źródło:
Archives of Foundry Engineering; 2013, 13, 3 spec.; 51-56
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
    Wyświetlanie 1-15 z 15

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