Microstructural characterization of squeeze-cast Al-8Fe-1.4V-8Si

ARHAMI M., SARIOGLU F., KALKANLI A., HASHEMIPOUR M.

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol.485, pp.218-223, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 485
  • Publication Date: 2008
  • Doi Number: 10.1016/j.msea.2007.07.065
  • Journal Name: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.218-223
  • Keywords: Al-Fe-V-Si alloy, squeeze casting, intermetallic phases, vanadium, SiC particles, V-SI ALLOY, METAL-MATRIX COMPOSITES, TEMPERATURE CREEP DEFORMATION, AL-8.3FE-0.8V-0.9SI ALLOY, MECHANICAL-PROPERTIES, ALUMINUM-ALLOYS, INTERMETALLIC PHASES, PARTICLE-SIZE, FE, BEHAVIOR
  • Middle East Technical University Affiliated: Yes

Abstract

This paper investigates the effect of vanadium on the composition and morphology of intermetallics formed during the squeeze casting of Mg-modified Al-8Fe-1.4V-8Si alloy in both monolithic form and as-reinforccd with 7.58,10.52 and 15.68 wt.% SiC particles (SiC(p)). Iron intermetallics of alpha-Al(7)(Fe,V)(3)Si and beta-Al(18)Fe(11)Si phases were predominantly observed in the alloy and composite. SEM studies and the EDX analyses revealed that refinement of Fe-intermetallics and modification of beta-phases to less deleterious morphologies of alpha-phases has been achieved by vanadium addition of 1.4%. Also, heat treatment enhances V diffusion and SiC particles act as nucleation sites for the formation of finer alpha-intermetallics. Fractographs exhibited cracking of long P-phases and partial decohesion of SiC(p) from the matrix. (C) 2007 Elsevier B.V. All rights reserved.