Effect of Co on Si and Fe containing intermetallic compounds IMCs in Al 20Si 5Fe alloys     
Yazarlar (4)
M. Fatih Kilicaslan
Kastamonu University, Türkiye
Prof. Dr. Fikret YILMAZ Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Soon Jik Hong
Kongju National University, Güney Kore
Orhan Uzun
Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale
Dergi Adı Materials Science and Engineering A
Dergi ISSN 0921-5093 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI-Expanded
Dergi Grubu Q4
Makale Dili İngilizce
Basım Tarihi 10-2012
Cilt No 556
Sayı 1
Sayfalar 716 / 721
DOI Numarası 10.1016/j.msea.2012.07.053
Makale Linki http://linkinghub.elsevier.com/retrieve/pii/S0921509312010155
Özet
The effects of cobalt addition on microstructure and mechanical properties of Al-20Si-5Fe-XCo (X=0, 1, 3, and 5) alloys were reported in this study. The alloys were produced by both conventional sand casting and melt-spinning at 20. m/s disk velocity. Microstructures of the samples were investigated using X-ray diffractometry (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Vickers micro-hardness tester was used for hardness measurements. Results showed that Co addition can alter morphology of Fe-bearing intermetallic compounds (IMCs) from long rod/needle-like structures to short rod-like ones, and lead to a more homogenous distribution in the microstructure. Addition of 5. wt% Co leads to a decrease in average size of the primary silicon phases in as-cast Al-Si alloys. In melt-spun alloys, with the addition of Co, the microstructure became finer and more homogenously distributed, while thickness of the featureless zone has seen great increase. The optimum Fe to Co ratio was found to be 1 for suppressing the undesirable effect of Fe-bearing acicular/needle-like intermetallic compounds. © 2012 Elsevier B.V.
Anahtar Kelimeler
Aluminum alloys | Intermetallics | Non-ferrous alloys | Rapid solidification process