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Microstructural changes in a mechanically alloyed Al-6.2Zn-2.5Mg-1.7Cu alloy (7010) with and without particulate SiC reinforcement

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Abstract

Elemental powders of Al, Zn, Mg, and Cu (corresponding to the composition of 7010 aluminium alloy) were milled in a high-energy attritor with and without additions of SiC particulates. The microstructural changes taking place in the milled powders (which eventually lead to mechanical alloying) are found to be retarded by SiC additions. High-resolution techniques such as electron probe microanalysis (EPMA) and transmission electron microscopy/energy-dispersive X-ray analysis (TEM/EDX) revealed the presence of localized solute-rich regions long after the diffraction line from these solutes had ceased to appear in the X-ray diffractograms. Zinc appears to be more difficult to be mechanically alloyed into aluminum than either Cu or Mg in spite of its comparatively larger diffusivity in aluminum.

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Authors and Affiliations

  1. the Department of Metallurgical Engineering and Materials Science, ITT Bombay, 400076, Bombay, India

    A. Bhaduri (Graduate Student), V. Gopinathan (Professor) & P. Ramakrishnan (Professor)

  2. the Department of Materials Science and Engineering, University of Surrey, GU2 5XH, Guildford, United Kingdom

    A. P. Miodownik (Professor Emeritus)

Authors
  1. A. Bhaduri
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  2. V. Gopinathan
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  3. P. Ramakrishnan
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  4. A. P. Miodownik
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Bhaduri, A., Gopinathan, V., Ramakrishnan, P. et al. Microstructural changes in a mechanically alloyed Al-6.2Zn-2.5Mg-1.7Cu alloy (7010) with and without particulate SiC reinforcement. Metall Mater Trans A 27, 3718–3726 (1996). https://doi.org/10.1007/BF02595463

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