Temat: Al-Si - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: The Effect of Modifier on the Microstructure of the AlSi10CuNiMn Alloy
Autorzy:: Cais, Jaromir
Heinrich, Jiri
Jirounkova, Klara
Tematy:: Al-Si alloy
microstructure
modification
microscopy
stop Al-Si
mikrostruktura
modyfikacja
mikroskopia; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/103309.pdf Link otwiera się w nowym oknie
Opis:: This paper deals with different types of modifiers and their effect on the microstructure of the Al-Si alloy. For the purposes of this research, strontium, antimony and calcium were used as the modifiers of the AlSi10CuNiMn alloy. Unmodified alloy was cast in order to be compared with the alloy modified by different modifiers in various concentrations. The results of this research were analysed via light and electron microscopy.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Hypoeutectic Al-Si Alloy with Cr, V and Mo to Pressure Die Casting
Autorzy:: Szymczak, T.
Gumienny, G.
Stasiak, I.
Pacyniak, T.
Tematy:: krystalizacja
odlewanie ciśnieniowe
stopy wieloskładnikowe
stopy Al-Si
metoda DTA
crystallization
pressure die casting
multicomponent Al-Si alloys
alloys Al-Si
DTA method; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/382365.pdf Link otwiera się w nowym oknie
Opis:: This paper presents the results of hypoeutectic 226 grade alloy as well as prepared on its basis Al-Si alloy containing Cr, V and Mo. The additives tested were added as AlCr15, AlV10 and AlMo8 master alloys. Alloys tested were poured into DTA sampler as well as using pressure die casting. An amount of Cr, V and Mo additives in alloy poured into DTA sampler comprised within the range approximately 0.05-0.35%. Alloys to pressure die casting contained 0.05-0.20% Cr, V and Mo. The crystallization process was examined using the derivative thermal analysis (DTA). The microstructure of castings made in the DTA sampler as well as castings made with use of pressure die casting were examined. The basic mechanical properties of castings made using pressure die casting were defined too. It has been shown in the DTA curves of Al-Si alloy containing approximately 0.30 and 0.35% Cr, Mo, and V there is an additional thermal effect probably caused by a peritectic crystallization of intermetallic phases containing the aforementioned additives. These phases have a morphology similar to the walled and a relatively large size. The analogous phases also occur in pressure die casting alloys containing 0.10% or more additions of Cr, V and Mo. The appearance of these phases in pressure die casting Al-Si alloys coincides with a decrease in the value of the tensile strength Rm and the elongation A. It has been shown die castings made of Al-Si alloys containing the aforementioned additives have a higher Rm and A than 226 alloy.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Combustion Engine Cylinder Liners Made of Al-Si Alloys
Autorzy:: Orłowicz, A. W.
Tupaj, M.
Mróz, M.
Trytek, A.
Tematy:: combustion engine
cylinder liner
Al-Si alloy
silnik spalinowy
tuleja cylindrowa
stop Al-Si; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/382953.pdf Link otwiera się w nowym oknie
Opis:: The paper deals with problems related to application of aluminum-silicon alloys for combustion engine cylinder liners.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Improvement of Al-Si Alloy Fatigue Strength by Means of Refining and Modification
Autorzy:: Tupaj, M.
Orłowicz, A. W.
Trytek, A.
Mróz, M.
Tematy:: Al-Si alloy
fatigue limit
refining
modification
stop Al-Si
granica zmęczenia
rafinacja
modyfikacja; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/379844.pdf Link otwiera się w nowym oknie
Opis:: The paper presents results of a study concerning an AlSi7Mg alloy and the effect of subjecting the liquid metal to four different processes: conventional refining with hexachloroethane; the same refining followed by modification with titanium, boron, and sodium; refining by purging with argon carried out in parallel with modification with titanium and boron salts and strontium; and parallel refining with argon and modification with titanium, boron, and sodium salts. The effect of these four processes on compactness of the material, parameters of microstructure, and fatigue strength of AlSi7Mg alloy after heat treatment. It has been found that the highest compactness (the lowest porosity ratio value) and the most favorable values of the examined parameters of microstructure were demonstrated by the alloy obtained with the use of the process including parallel purging with argon and modification with salts of titanium, boron, and sodium. It has been found that in the fatigue cracking process observed in all the four variants of the liquid metal treatment, the crucial role in initiation of fatigue cracks was played by porosity. Application of the process consisting in refining by purging with argon parallel to modification with Ti, B, and Na salts allowed to refine the microstructure and reduce significantly porosity of the alloy extending thus the time of initiation and propagation of fatigue cracks. The ultimate effect consisted in a distinct increase of the fatigue limit value.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Mechanical properties the Al-7%SiMg alloy with CuAl10Fe3Mn2 used in machine building and civil engineering
Autorzy:: Lipiński, Tomasz
Tematy:: Al-Si alloys
aluminum bronze
mechanical properties
stopy Al-Si
brąz aluminiowy
właściwości mechaniczne; Pokaż więcej
Wydawca:: Stowarzyszenie Menedżerów Jakości i Produkcji
Powiązania:: https://bibliotekanauki.pl/articles/104168.pdf Link otwiera się w nowym oknie
Opis:: Silumins are one of the most popular group among aluminum casting alloys. They are characterized by good mechanical and casting properties, low density, good electric and thermal conductivity, a low degree of contraction, good corrosion resistance and a relatively low melting temperature. The mechanical properties of hypoeutectic silumins can be improved through chemical modification as well as traditional or technological processing. Modification improves the mechanical properties of alloys through grain refinement. The effect of treatment has been given a lot of information first of all about microstructure and mechanical properties. This study presents the results of treatment of an Al-7%SiMg alloy with composition CuAl10Fe3Mn2 (as a powder) + (Al-7%SiMg + CuAl10Fe3Mn2) (as a powder) + (Al-7%SiMg + CuAl10Fe3Mn2) (in the form of a rod) in three different ranges. The experiments were conducted following a factor design 23 for 3 independent variables. The main addition was aluminum bronze, as well as clear or melted with raw alloy. The influence of the analyzed modifiers on the microstructure and mechanical properties of the processed alloy was presented in graphs. The modification of a hypoeutectic Al-7%SiMg alloy improved the alloy's properties. The results of the tests indicate that the mechanical properties of the modified alloy are determined by the components introduced to the alloy.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Modifications ALSI7MG0.3 alloys trough CA, SR and SB
Autorzy:: Cais, Jaromír
Lysoňková, Irena
Kraus, Pavel
Tematy:: Al-Si alloy
modifier
microstructure
EDX analysis
stop Al-Si
modyfikator
mikrostruktura
analiza EDX; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/102369.pdf Link otwiera się w nowym oknie
Opis:: This article deals with examing the effect of modifier on changes in microstructure of the alloy AlSi7Mg0.3. The content of the experiment was to examine the effect of addition of calcium, stroncium, and antimony to change the morphology of the eutectic silicon in the alloy type of Al-Si (namely AlSi7Mg0.3). Besides changes in the morphology of eutectic silicon was explored focused on character exlusion modifiers within microstructure of the modified alloy. Examination of the microstructure was realized by scanning electron microscopy and complemented by EDX analysis of the examined samples.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Role of Si on machined surfaces of Al-based automotive alloys under varying machining parameters
Autorzy:: Razin, Ahmed Asif
Ahammed, Dewan Salsabil
Nur, Maglub Al
Kaiser, Mohammad Salim
Tematy:: Al-Si alloys
roughness
temperature
chips
microstructure
stopy Al-Si
chropowatość
temperatura
wióry
mikrostruktura; Pokaż więcej
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Powiązania:: https://bibliotekanauki.pl/articles/2106430.pdf Link otwiera się w nowym oknie
Opis:: A morphological change due to Si contend into Al-based automotive alloys has been conducted on the characterization of machined surfaces in terms of roughness, temperature, chips formation as well as microstructure evaluation under different machining conditions. For this experiment, a shaper machine with HSS single point V-shaped cutting tool is used at different cutting speeds and depths of cut. The experimental results show that the surface roughness of the alloys decreases with the cutting speed and depth of cut but it is more prominent in the case of the cutting speed. This is because of a high cutting speed, which is more associated with the higher temperature and softening the work material leading to better surface finish. Higher Si added alloys also exhibit a better surface finish because the sample content is different fine and hard intermetallic due to ageing treatment, which also makes the alloys more brittle. For brittle and higher hardness, it produces a higher temperature during machining. During machining, relatively curly and short chips are formed by the high Si added alloy because of its low elongation properties. The fracture surfaces of higher Si added alloy display more crack propagation obtained by plate-like Si rich intermetallic.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Influence of Cooling Rate on Intergranular Corrosion in Al-Si7-Mg Alloy
Autorzy:: Bernat, L.
Tematy:: Al-Si-Mg alloy
intergranular corrosion
cooling rate
stop Al-Si-Mg
korozja międzykrystaliczna
szybkość chłodzenia; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/381720.pdf Link otwiera się w nowym oknie
Opis:: The use of aluminium cast alloys in automotive industry results from a tendency to considerably lower vehicle mass. Subject to working conditions, silumin casts may show occurrence of intergranular corrosion that reduces mechanical properties of the parts produced. The paper presents the influence of cooling rate – R of a plate cast of aluminium alloy EN AC-AlSi7Mg0,3 on the depth of appearance of intergranular corrosion. Samples were exposed to corrosive medium by immersion for 2,5; 12; 24 and 48 hours in an aqueous solution of NaCl+HCl+H₂O. The study demonstrated that cooling rate – R and subsurface porosity significantly influence on distribution and depth of intergranular corrosion in casts of subeutectic silumin.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Plasma Coatings on Aluminium-Silicon Alloy Surfaces
Autorzy:: Długosz, P.
Garbacz-Klempka, A.
Piwońska, J.
Darłak, P.
Młynarczyk, M.
Tematy:: plasma coating
Al-Si alloy
plasma oxidation
anodizing
powłoki plazmowe
stop Al-Si
utlenianie plazmowe
anodowanie; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2079836.pdf Link otwiera się w nowym oknie
Opis:: Plasma oxidation, similarly to anodic oxidation (anodizing), are classified as electrochemical surface treatment of metals such as Al, Mg, Ti and their alloys. This type of treatment is used to make surface of castings, plastically processed products, shaped with incremental methods to suitable for certain requirements. The most important role of the micro plasma coating is to protect the metal surface against corrosion. It is well known that coating of aluminium alloys containing silicon using anodic oxidation causes significant difficulties. They are linked to the eutectic nature of this alloy and result in a lack of coverage in silicon-related areas. The coating structure in these areas is discontinuous. In order to eliminate this phenomenon, it is required to apply oxidation coatings using the PEO (Plasma Electrolytic Oxidation) method. It allows a consistent, crystalline coating to be formed. This study presents the mechanical properties of the coatings applied to Al-Si alloy using the PEO method. As part of the testing, the coating thickness, microhardness and scratch resistance were determined. On the basis of the results obtained, it was concluded that the thickness of the coatings complies with the requirements of conventional anodizing. Additionally, microhardness values exceeded the results obtained with standard methods.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Improved Mechanical Properties of Al-Si Alloys by Adding an Extrusion Process to Conventional Processing Method
Autorzy:: Han, J. Y.
Femi, O. E.
Kilicaslan, F.
Jeong, C. U.
Baeg, C. H.
Hong, S. J.
Koo, J. M.
Tematy:: Al-Si alloys
extrusion
mechanical properties; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/355114.pdf Link otwiera się w nowym oknie
Opis:: In this study, the mechanical properties of Al-Si alloys was improved by selecting higher Si content and avoiding distortion in Al-Si matrix by adding an extrusion process such that the fabrication processes casting and extrusion were in sequence. Cast billets were extruded at ratios 4:1 and 10:1 to obtained two extruded bars with different processing parameters. The as-extruded samples were characterized and investigated for microstructure and mechanical properties. Optical Microscope was used to examined phase morphologies and microstructures of the extruded Al-Si bars. Mechanical properties were conducted on each sample to study the effectiveness of the additional extrusion process in high Si content Al-Si alloys. The result shows that by increasing the extrusion ratio, the size of the primary Si particle reduces leading to a higher density, better tensile and yield strength compared to the cast billet.
Dostawca treści:: Biblioteka Nauki

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