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Wyświetlanie 1-10 z 46
Tytuł:
Influence of Modification on the Structure and Morphology of Fracture of AlSi13Mg1CuNi
Autorzy:
Romankiewicz, R.
Romankiewicz, F.
Powiązania:
https://bibliotekanauki.pl/articles/382101.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
silumin alloy
alloy modification
fracture
silumin
modyfikacja stopu
pękanie
Opis:
The investigation revealed that the modification of the AlSi13Mg1CuNi silumin with the additives 0,25% AlSr10 and AlCu19P1,4 simultaneously provided the change of the morphology of eutectic silicon from the lamellar into the fibrous one. The change resulted in a double increase in the impact resistance of the alloy and the widening of the plastic area of the fracture of the silumin samples.
Źródło:
Archives of Foundry Engineering; 2013, 13, 2 spec.; 85-88
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of modifcation on the refinement of primary silicon crystals in hypereutectic silumin AlSi21CuNi
Autorzy:
Romankiewicz, R.
Romankiewicz, F.
Powiązania:
https://bibliotekanauki.pl/articles/112097.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
silumin
microstructure
micro additive
modification
silumin AlSi21CuNi
modyfikatory
mikrododatki
Opis:
On the paper the influence of modifying micro additives on the refinement of primary silicon crystals in the hypereutectic AlSi21CuNi piston silumin have been examined. As the modifiers there were used micro additives of Phosphorus in the form of AlCu19P1.4 and CuP12 pre-alloys, sulfur in the form of CuS and iron in the powdered form. The modifying micro additives were used separately and together. Micro additions of iron were used together with phosphorus. Sulfur micro addition provided the fragmentation of the primary silicon crystals, but not as effective as the phosphorus micro additive. The best effect of fragmentation of the primary silicon crystals was ensured by the combined addition of phosphorus in the form of AlCu19P1,4 pre alloy with a micro additive of powdered iron which reduced the average size of the primary silicon crystals from 114 μm to 20 μm.
Źródło:
Production Engineering Archives; 2018, 19; 30-36
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of modification for structure and impact resistance of silumin AlSi11
Autorzy:
Romankiewicz, R.
Romankiewicz, F.
Powiązania:
https://bibliotekanauki.pl/articles/111700.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
silumin
modification
fracture
modyfikacja
pęknięcie
Opis:
In this paper the results of the modification process of alloy AlSi11 as well as the influence of modification for structure and impact resistance have been presented. The investigation revealed that the modification of the AlSi11 silumin with the addition 0,05 - 0,4% AlSr10 and 0,1 - 0,2% AlB4 simultaneously provided the advantageous refinement of the α-phase as well as the change of the morphology of the eutectic silicon from the lamellar into the fibrous one. The change resulted in a relevant increase in the impact resistance of the alloy and the widening of the plastic area of the fracture of the silumin samples.
Źródło:
Production Engineering Archives; 2014, 3, 2; 6-9
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Study of the Tensile Strength of AlSi21CuNiMg Silumin in the Final Stage of Solidification and the Initial Stage of Cooling
Autorzy:
Romankiewicz, Remigiusz
Powiązania:
https://bibliotekanauki.pl/articles/106921.pdf
Data publikacji:
2019
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
silumin
solidification
modification
tensile strength
Opis:
The paper presents the results of tensile strength tests of AlSi21CuNiMg silumin made on a test stand. Silumin was under examination in an unmodified state and after modification with AlCu19P1.4 master alloy in quantity of 0.2% in relation to the mass of the alloy. Using a scanning microscope, the surface fractures obtained from tensile tests were tested. The structure and profiles of fractures were examined using an optical microscope. Modification of the tested silumin resulted in a favorable fragmentation and regular distribution of the crystals of the primary silicon in the alloy structure, which led to an almost twofold increase in the strength of the silumin samples at the final solidification stage from 3.5 to 6.6 MPa. As a result of these changes, the resistance of silumin to hot cracks should increase, which is of great importance when casting hypereutectic silumin in a metal mould that strongly inhibits the shrinkage of the castings.
Źródło:
Journal of Casting & Materials Engineering; 2019, 3, 3; 57-61
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the Effect of Cr, Mo, V and W on the Selected Properties of Silumins
Autorzy:
Szymczak, T.
Szymszal, J.
Gumienny, G.
Powiązania:
https://bibliotekanauki.pl/articles/379895.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mechanical properties
statistical method
multicomponent silumin
pressure casting
właściwości mechaniczne
metoda statystyczna
silumin wieloskładnikowy
odlewanie ciśnieniowe
Opis:
The results of statistical analysis applied in order to evaluate the effect of the high melting point elements to pressure die cast silumin on its tensile strength Rm, unit elongation A and HB were discussed. The base alloy was silumin with the chemical composition similar to EN-AC 46000. To this silumin, high melting point elements such as Cr, Mo, V and W were added. All possible combinations of the additives were used. The content of individual high melting point additives ranged from 0.05 to 0.50%. The tests were carried out on silumin with and without above mentioned elements. The values of Rm, A and HB were determined for all the examined chemical compositions of the silumin. The conducted statistical analysis showed that each of the examined high melting point additives added to the silumin in an appropriate amount could raise the values of Rm, A and HB. To obtain the high tensile strength of Rm = 291 MPa in the tested silumin, the best content of each of the additives should be in the range of 0.05-0.10%. To obtain the highest possible elongation A of about 6.0%, the best content of the additives should be as follows: chromium in the range of 0.05-0.15%, molybdenum 0.05% or 0.15%, vanadium 0.05% and tungsten 0.15%. To obtain the silumin with hardness of 117 HB, chromium, molybdenum and vanadium content should be equal to about 0.05%, and tungsten to about 0.5%.
Źródło:
Archives of Foundry Engineering; 2018, 18, 4; 77-82
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving Quality of the EN AC-43300 (AlSi9Mg) Alloy Destined for Castings of a Pump Casings
Autorzy:
Jarco, A.
Dudyk, M.
Płonka, S.
Powiązania:
https://bibliotekanauki.pl/articles/381768.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mechanical properties
hypoeutectic silumin
refining
ATD-AED method
właściwości mechaniczne
silumin podeutektyczny
rafinacja krzemu
metoda ATD AED
Opis:
Among non-ferrous alloys, the aluminum alloys have found the most widespread applications within foundry industry. Hypoeutectic silumin of the AlSi9Mg grade is commonly used for large, heavy duty machinery castings with complicated shape and high strength. From technical point of view, tendency to creation of coarse structure can be considered as a drawback of such alloy, what can have adverse effect on properties of the alloy. To obtain optimal structure of the castings and to assure improvement of their mechanical properties, the most effective treatment to perform is modification. Quality of performed modification treatment depends on proper dosing of inoculant and maintaining suitable temperature and time of keeping the alloy before pouring. In the paper are presented test results of crystallization course of refined and modified silumin of the EN AC–43300 (AlSi9Mg) grade, used in castings of pump casings. It has been determined an effect of performed processes of refining and modification on the mechanical properties (Rm, A5, HB and KCV), additionally, metallurgical tests of the alloy have been performed. Basing on analysis of obtained results, the most advantageous modification variant, which is suitable for castings of pump casings and complying with requirements of customers, has been selected.
Źródło:
Archives of Foundry Engineering; 2015, 15, 2 spec.; 31-34
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Vanadium and Molybdenum on the Crystallization, Microstructure and Properties of Hypoeutectic Silumin
Autorzy:
Szymczak, T.
Gumienny, G.
Pacyniak, T.
Powiązania:
https://bibliotekanauki.pl/articles/382228.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
theory of crystallization
pressure die casting
multicomponent silumin
TDA method
teoria krystalizacji
odlewanie ciśnieniowe
silumin wieloskładnikowy
metoda ATD
Opis:
The paper presents the results of hypoeutectic silumin 226 grade and silumin produced on its basis through the addition of V and Mo. Vanadium and molybdenum were added as the preliminary alloy AlV10 and AlMo8 in an amount providing the concentration of 0.1; 0.2; 0.3 and 0.4% V and Mo. TDA curves of tested silumins were presented; regardless of the chemical composition there were similar thermal effects. Pressure castings microstructure research revealed the presence in silumins with the addition of V and Mo phases do not occur in silumin without these additives. These phases have a morphology similar to the walled, and their size increases with increasing concentration of V and Mo. The size of the precipitates of these phases silumin containing 0.1% V and Mo does not exceed 10 microns, while 0.4% of the content of these elements increases to about 80 microns. Tests of basic mechanical properties of silumins were carried out. It has been shown that the highest values of tensile strength Rm = 295 MPa and elongation A = 4.2% have silumin containing approximately 0.1% V and Mo. Increasing concentrations of these elements causes a gradual lowering of the Rm and A values.
Źródło:
Archives of Foundry Engineering; 2015, 15, 4; 81-86
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Tungsten and Molybdenum on the Crystallization, Microstructure and Properties of Silumin 226
Autorzy:
Szymczak, T.
Gumienny, G.
Pacyniak, T.
Walas, K.
Powiązania:
https://bibliotekanauki.pl/articles/381984.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
theoretical basis
casting process
pressure casting
multicomponent silumin
TDA method
podstawy teoretyczne
proces odlewania
odlewanie ciśnieniowe
silumin wieloskładnikowy
metoda ATD
Opis:
The work presents the results of the examinations of silumin 226 as well as a silumin produced on its basis containing a W and Mo addition introduced in the amount of 0.1; 0.2; 0.3 and 0.4% of both elements simultaneously. Investigations of the crystallization process of the silumins by the TDA method were conducted. Also, a microscopic analysis of their microstructure was performed and their basic mechanical properties were determined. Microstructure tests were made on casts produced in an TDA sampler as well as by the pressure method. The investigations exhibited a change in the course of crystallization of the silumin containing 0.3 and 0.4% W and Mo with respect to silumin 226 and the silumin with the addition of 0.1 and 0.2%. The presence of additional phases which did not occur in the case of lower addition contents was established in the silumin containing 0.3-0.4% W and Mo, regardless of the applied casting technology. The tests showed the possibility of increasing the tensile strength Rm, the proof stress Rp0,2 and the unit elongation A of the silumin as a result of a simultaneous introduction of the W and Mo addition. The highest values of Rm, Rp0,2 and A were obtained in the silumins with the additions of these elements within the range of 0.1-0.2% each.
Źródło:
Archives of Foundry Engineering; 2015, 15, 3; 61-66
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative study in the passive force and cutting torque in the milling process of polymer matrix composites and aluminum alloys
Autorzy:
Ciecieląg, K
Zaleski, K.
Powiązania:
https://bibliotekanauki.pl/articles/103229.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
polymer composites
silumin
duralumin
passive force
cutting torque
Opis:
This paper presents the results of a study undertaken to investigate the passive force and cutting torque during the milling of carbon fiber reinforced plastics saturated with epoxy resin and two aluminum alloys: AlSi21CuNi (AK 20) and 7075 (PA 9). The milling process was conducted using end mills with diamond inserts. The machining parameters were changed equally for each material as a result of which the passive force and cutting torque during the milling of these materials could be compared.
Źródło:
Advances in Science and Technology. Research Journal; 2013, 7, 18; 6-12
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of time on modification effect of silumin AlSi11 with strontium and boron
Wpływ czasu na efekt modyfikacji siluminu AlSi11 strontem i borem
Autorzy:
Romankiewicz, R.
Romankiewicz, F.
Powiązania:
https://bibliotekanauki.pl/articles/263840.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
silumin
modification
structure
mechanical properties
modyfikacja
struktura
właściwości mechaniczne
Opis:
Studies on the effect of time on the modification of AlSi11 silumin with variable strontium micro additives in the form of an AlSr10 master alloy and boron in an AlB4 master alloy were investigated. The results showed that the strontium micro additive resulted in a satisfactory improvement in the α(Al) + β(Si) eutectic and an increase in tensile strength (Rm) and unit elongation (A5); this is also the case two hours after adding the modifier. The simultaneous modification of silumin with AlB4 and AlSr10 causes a strong fragmentation of the alloy grains and significant improvement in Rm and A5 (also two hours after adding the modifiers).
Przeprowadzono badania nad wpływem czasu na modyfikację siluminu AlSi11 zmiennymi mikrododatkami strontu w postaci zaprawy AlSr10 oraz boru w postaci zaprawy AlB4. Wyniki badań wykazały, że mikrododatek strontu powoduje zadowalające uszlachetnienie eutektyki α(Al) + β(Si) i wzrost wytrzymałości na rozciąganie (Rm) oraz wydłużenia względnego (A5), także po upływie dwóch godzin po dodaniu modyfikatora. Równoczesna modyfikacja siluminu zaprawami AlB4 i AlSr10 powoduje silne rozdrobnienie ziarn stopu i istotną poprawę Rm oraz A5, również po upływie dwóch godzin po dodaniu modyfikatorów.
Źródło:
Metallurgy and Foundry Engineering; 2017, 43, 3; 209-217
1230-2325
2300-8377
Pojawia się w:
Metallurgy and Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 46

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