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Comparison of the Microstructure and Mechanical Properties of As-Cast A356/SiC MMC Processed by ARB and CAR Methods

  • Roohollah Jamaati
  • Sajjad Amirkhanlou
  • Mohammad Reza Toroghinejad
  • Behzad Niroumand
Article

Abstract

Accumulative roll bonding (ARB) and continual annealing and roll-bonding (CAR) processes were used in this study for improving the microstructure and mechanical properties of the A356/10 vol.% SiC metal matrix composite (MMC) produced by semi-solid metal processing (SSM). The results showed that using the ARB and CAR processes led to the following points: (a) the uniformity of the silicon and silicon carbide in the aluminum matrix improved, (b) the Si particles became finer and more spheroidal in appearance, (c) the porosity disappeared, (d) the bonding quality between the reinforcement and the matrix improved, (e) the particle-free zone disappeared, and therefore (f) the tensile strength (TS), elongation, and formability index of the MMC samples improved. However, it was found that the CAR process is a better method for improvement of microstructure and mechanical properties of as-cast MMC compared to ARB process.

Keywords

joining mechanical testing metal matrix composites rolling 

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Copyright information

© ASM International 2011

Authors and Affiliations

  • Roohollah Jamaati
    • 1
  • Sajjad Amirkhanlou
    • 1
  • Mohammad Reza Toroghinejad
    • 1
  • Behzad Niroumand
    • 1
  1. 1.Department of Materials EngineeringIsfahan University of TechnologyIsfahanIran

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