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      Properties of high specific strength Al-4wt.% Al2O3/B4C nano-composite produced by accumulative roll bonding process

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      Author
      Alizadeh, M.
      beni H.A.
      Ghaffari, M.
      Amini, R.
      Date
      2013
      Source Title
      Materials and Design
      Print ISSN
      0261-3069
      Publisher
      Elsevier Ltd
      Volume
      50
      Pages
      427 - 432
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      The influence of nano-scale reinforcement on the mechanical and microstructural properties of ultrafine-grained composites was studied. Al matrix (pure aluminum) composites, with a grain size of 230nm and B4C and Al2O3 reinforcements with an average size of 50nm, were fabricated via the accumulative roll bonding (ARB) process. To evaluate structure and microstructure of the produced composites, X-ray diffraction analysis (XRD) and transmission electron microscopy (TEM) were applied. Mechanical properties of the specimens were investigated by tensile and hardness tests. The result revealed that in comparison with monolithic Al (ARBed Al without ceramic particles), the presence of nano-particles enhances specific strength of composites. Also, the results showed that with increasing ARB cycles, the microhardness of the composites increases. In addition, the specific strength and microhardness of the composite samples are higher than those of the monolithic Al. The density of the composite samples and monolithic Al was measured by the Archimedes method showing that the density decreases in presence of ceramic particles. © 2013 Elsevier Ltd.
      Keywords
      Mechanical properties
      Metal-matrix composites
      Nano-composites
      Transmission electron microscopy
      Mechanical properties
      Metallic matrix composites
      Microhardness
      Nanocomposites
      Reinforcement
      Roll bonding
      Transmission electron microscopy
      X ray diffraction analysis
      Accumulative roll bonding
      Accumulative roll bonding (ARB) process
      High specific strength
      Metal matrix composites
      Micro-structural properties
      Structure and microstructures
      Transmission electron microscopy (TEM)
      X-ray diffraction analyses (XRD)
      Aluminum
      Permalink
      http://hdl.handle.net/11693/21120
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.matdes.2013.03.018
      Collections
      • Department of Electrical and Electronics Engineering 3524
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
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