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      Investigation of grain refinement in Al/Al2O3/B 4C nano-composite produced by ARB

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      Author(s)
      Akbari Beni H.
      Alizadeh, M.
      Ghaffari, M.
      Amini, R.
      Date
      2014
      Source Title
      Composites Part B: Engineering
      Print ISSN
      13598368
      Volume
      58
      Pages
      438 - 442
      Language
      English
      Type
      Article
      Item Usage Stats
      233
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      329
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      Abstract
      In this study, Al/Al2O3/B4C nano-composites were fabricated via the accumulative roll bonding (ARB) process. The grain refinement of the Al/Al2O3/B4C nano-composite strips during the ARB process was studied. Microstructural characterizations of the fabricated composites after 2, 5, and 9 cycles were performed by transmission electron microscopy (TEM). The results showed that the composite sample, after 9 cycles, was filled with homogenously distributed ultra fine grains with an average grain size of 230 nm. The findings also revealed that the increase in the dislocation density due to the presence of the nano-sized particles resulted in the grain refinement of the specimens. It was also found that the grain refinement is accelerated by the presence of the refinement particles. © 2013 Elsevier Inc. All rights reserved.
      Keywords
      A. Metal-matrix composites (MMCs)
      B. Microstructure
      D. Electron microscopy
      A. Metal-matrix composites (MMCs)
      Accumulative roll bonding (ARB) process
      Average grain size
      Composite samples
      Dislocation densities
      Micro-structural characterization
      Nano-sized particles
      Ultra fine grain
      Grain refinement
      Metallic matrix composites
      Nanocomposites
      Particle size
      Roll bonding
      Transmission electron microscopy
      Grain size and shape
      Permalink
      http://hdl.handle.net/11693/26522
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.compositesb.2013.10.037
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