Doğrusal katılaştırılmış Al-%13ağ.Mg2Si alaşımının mikroyapı karakterizasyonu
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Tarih
2017
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In the present work, effect of growth rates on microstructure for directionally solidified Al-13wt. %Mg2Si pseudoeutectic alloy at a constant temperature gradient were studied. The composition of pseuodoeutectic Al-Mg2Si alloy in Al-Mg-Si system was chosen to be Al13wt.%Mg2Si (Al–8.75wt.%Mg–4.25wt.%Si) to growth the eutectic phases from ternary liquid.Directional solidification process were carried out with different growth rates (V8.33–175.0 µm/s) at a constant temperature gradient (G6.63 K/mm) by using synchronous motors running at different speed by Bridgman-type furnace.According to phase diagrams and EDX results light grey, black and dark grey phases were identified as quenched liquid phase, Mg2Si coral-like and –Al matrix, respectively.As the growth rate is increased, the eutectic spacings decrease. When the growth rate of samples increases from 8.33 to 175 m/s the average eutectic spacing for Mg Si 2 decrease from 7.12 to 1.70µm. The highest eutectic spacing was obtained at the minimum growth rate and a constant temperature gradient (V8.33 µm/s, G6.68 K/mm). On the other hand, the smallest eutectic spacing was measured at the maximum value of growth rate and a constant temperature gradient (V175.0 m/s, G6.68 K/mm). The dependency of lamellar spacing () on growth rates (V) were obtained as 0.45 16.95 2 Mg Si V for AlMg2Sipseudoeutectic alloy.The bulk growth rate was also determined as V 2 Mg Si 2 408.96 µm3 /s by using the measured values of Mg Si 2 and V.
Açıklama
Anahtar Kelimeler
Doğrusal katılaştırma, Alüminyum alaşımlar, Mikroyapı, Ötektik mesafeler, Linear solidification, Aluminum alloys, Microstructure, Eutectic distances
Kaynak
Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi
WoS Q Değeri
Scopus Q Değeri
Cilt
8
Sayı
4
Künye
Kaygısız, Y. (2017). Doğrusal katılaştırılmış Al-%13ağ.Mg2Si alaşımının mikroyapı karakterizasyonu. Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi, 8, 4, 723-732.
