- Tytuł:
- Effect of Modification and Cooling Rate on Primary Grain in Al-Cu Alloy
- Autorzy:
-
Górny, M.
Sikora, G. - Powiązania:
- https://bibliotekanauki.pl/articles/383080.pdf
- Data publikacji:
- 2014
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
modification
cooling rate
aluminium alloys
grain refinement
modyfikacja
szybkość chłodzenia
stopy aluminium
rozdrobnienie ziarna - Opis:
- This paper presents a study of the effect of the modification and coolingrate on the grain countα(Al) in the Al-5Cu alloy. Research was performed on castings with walls thickness between 3 mm and 25 mm. Cooling curves were recorded to determine the cooling rate and the degree of undercooling at the beginning of solidification. It has been shown that cooling rate increases exponentially as the wall thickness of casting decreases. Moreover it has been demonstrated that the cooling rate of castings changes within a wide range (21ºC/s - 1ºC/s) when the wall thickness changes from 3 up to 25 mm. Metallographic examinations revealed primary grains (primary α(Al) grains).The paper show that the relationship between the grain count and the degree of undercooling (for non-modified and modified alloys) can be represented by the equation N = Nv = np·exp(-b/_Tα), based on the Weibull's distribution of the size of nucleation sites.
- Źródło:
-
Archives of Foundry Engineering; 2014, 14, 3; 21-24
1897-3310
2299-2944 - Pojawia się w:
- Archives of Foundry Engineering
- Dostawca treści:
- Biblioteka Nauki
Artykuł