Fracture toughness (K1C) and tensile properties of as-cast and age-hardened aluminium (6063)silicon carbide particulate composites

K. K. Alaneme, A. O. Aluko

Research output: Contribution to journalArticlepeer-review

185 Citations (Scopus)


The tensile and fracture behavior of as-cast and age-hardened aluminium (6063), silicon carbide particulate composites produced, using borax additive and a two step stir casting method, was investigated. Al (6063), SiCp composites having 3, 6, 9, and 12 volume percent of SiC were produced, and sample representatives of each composition were subjected to age-hardening treatment at 1800 °C for 3 hours. Tensile and Circumferential Notched Tensile (CNT) specimens were utilized for tension testing to evaluate, respectively, the tensile properties and fracture toughness of the composites. Experimental results show that the ageing treatment resulted in little improvement in the tensile strength of the composites. The tensile strength and yield strength increased to almost the same magnitude with an increase in SiC volume percent for both as-cast and age-hardened conditions. The increase was, however, more significant for the 9 and 12 volume percent SiC reinforcement. The strain to fracture was less sensitive to volume percent SiC reinforcement and ageing treatment, with values less than 12% strain to fracture observed in all cases. The fracture toughness, however, improved significantly with ageing treatment (as-cast K1C=6.63-6.71MPam12; ageing treatment K1C=7.57-8.2MPam12).

Original languageEnglish
Pages (from-to)992-996
Number of pages5
JournalScientia Iranica
Issue number4
Publication statusPublished - Aug 2012
Externally publishedYes


  • Ageing treatment
  • Al (6063)Sic composite
  • Fracture toughness
  • Stir-casting
  • Tensile properties

ASJC Scopus subject areas

  • General Engineering


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