Hot Deformation Behavior of 6061 and 7108 Al-SiCp Composites

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Abstract

Hot deformation behavior of Al 6061- and Al 7108-SiC particulated composites (Al-PMMCs), prepared by stir casting with SiC particulates (SiCp) size of 8 and 15 μm and volume fraction from 0 to 20% is studied by uniaxial compression test carried out at temperature range from room temperature to 500 °C. The flow stress, work hardening behavior, and Young’s modulus are determined. Dynamic recrystallization is also studied. Work hardening and Young’s modulus are directly correlated with composite constituents, whereas the flow stress is greatly influenced by the porosity and SiCp agglomeration. The role of the SiCp in increasing the flow stress decreases by increasing the deformation temperature. The dynamic recrystallization process is stimulated by refining the SiCp and increasing their fraction in soft Al matrix. On the other hand, the PMMCs with Al6061 matrix has more potential for strain hardening than that with Al 7108 matrix. The strain hardening rate is influenced by the matrix type more than the SiCp volume fraction and size.

Keywords

Al-SiC metal matrix composites Al 6061 Al 7108 deformation behavior SiC particulates stir casting wrought Al alloys 
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Notes

Acknowledgments

This work is a part of cooperation between Clausthal University of Technology, Germany (TUC) and Ain Shams University, Egypt (ASU), financed by Deutsche Forschung Gemeinschaft (DFG), “Contract No. DFG PA 837/17-1”. We Acknowledge Trimet Aluminum AG for providing the raw materials.

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Copyright information

© ASM International 2012

Authors and Affiliations

  • M. Soliman
    • 1
  • A. El-Sabbagh
    • 2
  • M. Taha
    • 2
  • H. Palkowski
    • 1
  1. 1.Institute of MetallurgyClausthal University of TechnologyClausthal-ZellerfeldGermany
  2. 2.Faculty of EngineeringAin-Shams UniversityCairoEgypt

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