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Fabrication of high-strength al/sicp nanocomposite sheets by accumulative roll bonding

Rezayat, M ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1007/s11661-011-1039-7
  3. Publisher: 2012
  4. Abstract:
  5. Accumulative roll bonding (ARB) was successfully used as a severe plastic deformation method to produce Al-SiC nanocomposite sheets. The effects of process pass and amount of SiC content on microstructure and mechanical properties of the composites are investigated. As expected, production of ultrafine grain structures by the ARB process as well as nanosize particulate reinforcements in the metal matrix composite (MMC) resulted in excellent mechanical properties. According to the results of the tensile tests, it is shown that the yield and tensile strengths of the composite sheet increased with the number of ARB cycles without saturation at the last cycles. Scanning electron microscopy (SEM) revealed that the particles had a random and uniform distribution in the matrix by the last ARB cycles, and strong mechanical bonding takes place at the interface of the particle matrix. Transmission electron microscopy (TEM) and the corresponding selected area diffraction (SAD) demonstrate ultrafine grains with large misorientation in the structure. It is also shown that by increasing the volume fraction of particles up to 3.5 vol pct, the yield and tensile strengths of the composite sheets increased more than 1.3 and 1.4 times the accumulative roll-bonded aluminum sheets, respectively
  6. Keywords:
  7. Accumulative roll bonding ; Accumulative roll-bonded ; Al/SiCp ; Composite sheets ; High-strength ; Mechanical bonding ; Metal matrix composites ; Microstructure and mechanical properties ; Mis-orientation ; Nano-size ; Particulate reinforcements ; Selected area diffraction ; Severe plastic deformations ; Tensile tests ; Transmission electron microscopy tem ; Ultra fine grain ; Ultrafine grain structures ; Uniform distribution ; Yield and tensile strength ; Mechanical properties ; Nanocomposites ; Roll bonding ; Scanning electron microscopy ; Silicon carbide ; Tensile strength ; Tensile testing ; Transmission electron microscopy ; Metallic matrix composites
  8. Source: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science ; Volume 43, Issue 6 , 2012 , Pages 2085-2093 ; 10735623 (ISSN)
  9. URL: http://link.springer.com/article/10.1007%2Fs11661-011-1039-7