Journal of Materials Science

, Volume 29, Issue 17, pp 4645–4650 | Cite as

Effect of thermal ageing on hardness, tensile and impact properties of an alumina microsphere-reinforced aluminium metal-matrix composite

  • J. P. Unsworth
  • S. Bandyopadhyay


Thermal ageing studies have been carried out with an alumina microsphere-reinforced 6061 aluminium metal-metrix composite (MMC). A solution treatment temperature of 530°C for 1.5 h and ageing temperature 175°C with ageing time ranging between 0 and 12 h have been used. It was observed that the hardness achieves a peak value in about 8 h; the ultimate tensile strength shows an increase with increasing ageing time, and reaches a plateau at about 10 h. On the other hand, elongation to failure and impact properties show a sharp decline at approximately 4 h of ageing time. Also, a limited amount of experiments using 175°C/8 h ageing after solution treatment at 510, 490, 470 and 430 °C for 1.5 h show that the hardness of the MMC deceases steadily as the solution treatment temperature is decreased.


Polymer Alumina Tensile Strength Material Processing Treatment Temperature 
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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • J. P. Unsworth
    • 1
  • S. Bandyopadhyay
    • 1
  1. 1.School of Materials Science and EngineeringUniversity of New South WalesKensingtonAustralia

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