Statistical analysis of tensile properties of cast A357/Al2O3 MMCs

M Emamy, A Razaghian, S Kaboli, John Campbell

Research output: Contribution to journalArticle

5 Citations (Scopus)


An analysis of the statistical distribution of the ultimate tensile strength (UTS) of cast Al2O3 containing aluminium matrix composite and its matrix alloy (A357) was carried out using different volume fractions of alumina particles (0, 5, 10 15 and 20%). The scatter of UTS data was assessed by the use of two parameter Weibull analysis. Results for the matrix alloy and metal matrix composites in the heat treated condition (T6) were compared. It was found that the addition of reinforcing particles to the matrix alloy resulted in lower UTS and ductility and increased scatter of results. Weibull modulus of cast MMC rods was found to be about 22 in the matrix alloy, falling to six in the 20% alumina MMC. Fractographic examinations of lower strength specimens showed that oxide films and the consequent porosity play an important role in fracture. The future potential, if MMCs can be manufactured without entrained oxides, is seen to be exciting.
Original languageEnglish
Pages (from-to)149-156
Number of pages8
JournalMaterials Science and Technology
Issue number2
Publication statusPublished - 1 Feb 2010


  • Metal matrix composites
  • Tensile properties
  • Cast aluminium alloy
  • Alumina particles
  • Weibull analysis


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