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Journal of Materials Science

, Volume 29, Issue 9, pp 2321–2327 | Cite as

Fracture characteristics of a particulate-reinforced metal matrix composite

  • M. J. Hadianfard
  • J. Healy
  • Y. -W. Mai
Papers

Abstract

The effect of particulates on the failure mechanism of an Al-Mg-Si alloy 6061 with 20% angular alumina particles was studied. Fracture toughness tests were conducted on compact tension peak-aged specimens. The interaction of the reinforcement phase with the crack was investigated by optical microscopy and scanning electron microscopy, both on the surface and in the mid-thickness of the fractured specimen. It is shown that the fractured particles ahead of the crack tip, in particular the larger particles, play an important role in the void-initiation phase of the fracture process. Particle size and aspect ratio determine the likelihood of fracture. Some differences in the failure mechanisms have been observed between the mid-thickness and the surface of the specimen because of the difference between plane strain and plane stress fractures.

Keywords

Fracture Toughness Failure Mechanism Stress Fracture Metal Matrix Composite Alumina Particle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • M. J. Hadianfard
    • 1
  • J. Healy
    • 1
  • Y. -W. Mai
    • 1
  1. 1.Centre for Advanced Materials Technology, Department of Mechanical EngineeringUniversity of SydneyAustralia

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