Annealed Microstructures in Mechanically Milled Fe-0.6%O Powders

  1. Prof. Dr. Michael Zehetbauer2 and
  2. Prof. Ruslan Z. Valiev3
  1. A. Belyakov,
  2. Y. Sakai,
  3. T. Hara,
  4. Y. Kimura and
  5. K. Tsuzaki

Published Online: 28 JAN 2005

DOI: 10.1002/3527602461.ch10d

Nanomaterials by Severe Plastic Deformation

Nanomaterials by Severe Plastic Deformation

How to Cite

Belyakov, A., Sakai, Y., Hara, T., Kimura, Y. and Tsuzaki, K. (2004) Annealed Microstructures in Mechanically Milled Fe-0.6%O Powders, in Nanomaterials by Severe Plastic Deformation (eds M. Zehetbauer and R. Z. Valiev), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527602461.ch10d

Editor Information

  1. 2

    Institut für Materialphysik, Universität Wien, Boltzmanngasse 5, 1090 Wien, Austria

  2. 3

    Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, 12 K. Marks Str., Ufa, 450 000, Russia

Author Information

  1. Steel Research Center, National Institute for Materials Science, Tsukuba, Japan

Publication History

  1. Published Online: 28 JAN 2005
  2. Published Print: 25 FEB 2004

ISBN Information

Print ISBN: 9783527306596

Online ISBN: 9783527602469

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Keywords:

  • annealed microstructures;
  • mechanically milled Fe-0.6%O powders;
  • milling time;
  • ultra fine-grained microstructures

Summary

The structural changes taking place in mechanically milled Fe-0.6%O powders during annealing at 700 °C for an hour were studied. The iron-iron oxide powders were mechanically milled in an argon atmosphere for 20 to 300 hours. An increase in the milling time promoted the development of ultra fine-grained microstructures after the heating. The average annealed grain size decreased from about 0.8 to 0.13 µm when the milling time was increased from 20 to 300 hours. Such difference in the grain sizes was caused by the variation of oxide distributions. The volume fraction of dispersed oxides (the size of about 10 nm) increased from 0.3 % to 2.5 % with increase in the milling time from 20 to 300 hours.