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Wyszukujesz frazę "intermetalik" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Influence of Melt Quality on the Formation of Fe Intermetallic in A360 Alloy
Autorzy:
Bas, E. N.
Alper, S.
Tuncay, Tansel
Dispinar, Derya
Kirtay, Sebahattin
Powiązania:
https://bibliotekanauki.pl/articles/2174621.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
A360
intermetallic
melt quality
cooling rate
intermetalik
jakość stopu
szybkość chłodzenia
Opis:
The solubility of Fe in aluminium alloys is known to be a problem in the casting of aluminium alloys. Due to the formation of various intermetallic phases, the mechanical properties decrease. Therefore, it is important to determine the formation mechanisms of such intermetallic. In this work, A360 alloy was used, and Fe additions were made. The alloy was cast into the sand and die moulds that consisted of three different thicknesses. In this way, the effect of the cooling rate was investigated. The holding time was selected to be 5 hours and every hour, a sample was collected from the melt for microstructural analysis. Additionally, the melt quality change was also examined by means of using a reduced pressure test where the bifilm index was measured. It was found that the iron content was increased after 2 hours of holding and the melt quality was decreased. There was a correlation between the duration and bifilm index. The size of Al-Si-Mn-Fe phases was increased in parallel with the bifilm content regardless of the iron content.
Źródło:
Archives of Foundry Engineering; 2022, 22, 3; 53--59
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Three Dimensional Morphology of β-Al5FeSi Intermetallics in AlSi Alloys
Autorzy:
Mikołajczak, P.
Ratke, L.
Powiązania:
https://bibliotekanauki.pl/articles/383272.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminum alloy
intermetallics
β-Al5FeSi
X-ray tomography
morphology
solidification
stop aluminium
intermetalik
tomografia rentgenowska
Opis:
Iron is the most common and detrimental impurity in casting alloys and has been associated with many defects. The main consequence of the presence or adding of iron to AlSi alloys is the formation Fe-rich intermetallics with especially deleterious β-Al5FeSi. β-Al5FeSi phases are most often called needles on 2D micro sections, whilst platelets in 3D geometry. The x-ray tomography results have demonstrated Fe-rich phases with shapes different from simple forms such as needles or platelets and presented bent and branched phases. β grown as complicated structure of bent and branched intermetallics can decrease feeding ability, strengthen pores nucleation and eutectic colonies nucleation leading to lower permeability of mushy zone and porosity in the castings.
Źródło:
Archives of Foundry Engineering; 2015, 15, 1; 47-50
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Precipitation of Sigma and Chi Phases in Cast Standard Duplex Stainless Steel
Autorzy:
Myška, Martin
Bořil, Petr
Krutiš, Vladimír
Kaňa, Václav
Zádĕra, Antonin
Powiązania:
https://bibliotekanauki.pl/articles/27314154.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
cast duplex steel
intermetallics
precipitation
Sigma phase
Chi phase
odlewy
stal duplex
intermetalik
wytrącenia
faza sigma
faza chi
Opis:
This work deals with the problem of intermetallic phases in cast standard duplex steel ASTM A890 Gr 4A (generally known as 2205). The investigated steel was subjected to isothermal heat treatment in the range from 595 °C to 900 °C and in the duration from 15 minutes to 245 hours, and was also investigated in terms of anisothermal (natural) cooling after casting into the mould. The precipitation starts at grain boundaries with a consistent ferrite transformation. The work is focused on the precipitation of the sigma phase (σ) and the chi phase (χ). Examination of the microstructure was conducted using light and scanning electron microscopy. Their statistical analysis was carried out using the results of the investigations of precipitation processes in the microstructure, both within the grains and at the grain boundaries. To illustrate this impact, the surface area of precipitates was evaluated. The percentage of these intermetallic phases was calculated by measuring their area using a computer image analysis system. Based on their observations, a combined time-temperature transformation (TTT) diagram with continuous cooling transformation (CCT) curves was created.
Źródło:
Archives of Foundry Engineering; 2023, 23, 2; 29--34
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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