Please use this identifier to cite or link to this item:
|Type:||Artigo de periódico|
|Title:||Investigation of intermetallics in hypoeutectic Al-Fe alloys by dissolution of the Al matrix|
|Abstract:||During the non-equilibrium solidification typical of DC (direct chill) castings a range of cooling rates occur from the surface to the casting center, and can cause the formation of metastable intermetallic phases (Al(m)Fe, Al(6)Fe, etc.) in addition to the stable Al(3)Fe phase. The extensive presence of the plate-like Al3Fe phase in the as-cast structure adversely influences the mechanical properties of Al-Fe alloys, since this morphology is more likely to induce microcracks than the fibrous Al(6)Fe phase. The aim of this study was to present a method of characterization of AlFe intermetallics which is based on the dissolution of the aluminum matrix in distilled I-butanol. Optical microscopy and SEM analysis of the undissolved intermetallics have permitted characterization of the morphology, distribution, size and chemical composition of both Al(3)Fe and Al(6)Fe phases. The results have shown that Al(6)Fe prevails for growth rates V(L) and cooling rates (T) over dot(L) higher than 0.7 mm/s and 1.5 K/s, respectively. (C) 2009 Elsevier Ltd. All rights reserved.|
|Subject:||Iron aluminides (based on FeAl)|
|Editor:||Elsevier Sci Ltd|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.