Anelastic Properties of Nanocrystalline Magnesium

  1. Prof. Dr. Michael Zehetbauer3 and
  2. Prof. Ruslan Z. Valiev4
  1. Zuzanka Trojanová1,
  2. Bernd Weidenfeller2,
  3. Pavel Lukác1,
  4. Werner Riehemann2 and
  5. Miroslav Stank1

Published Online: 28 JAN 2005

DOI: 10.1002/3527602461.ch7c

Nanomaterials by Severe Plastic Deformation

Nanomaterials by Severe Plastic Deformation

How to Cite

Trojanová, Z., Weidenfeller, B., Lukác, P., Riehemann, W. and Stank, M. (2004) Anelastic Properties of Nanocrystalline Magnesium, 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.ch7c

Editor Information

  1. 3

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

  2. 4

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

Author Information

  1. 1

    Department of Metal Physics, Charles University, Praha, Czech Republic

  2. 2

    Department of Materials Engineering and Technology, Technical University Clausthal, Clausthal-Zellerfeld, Germany

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:

  • anelastic properties;
  • nanocrystalline magnesium;
  • X-ray line profile analysis

Summary

Internal friction in nanocrystalline Mg was measured by force vibration method at three frequencies. The specimens were prepared by milling procedure in an inert atmosphere and were subsequently compacted and hot extruded. The linear grain size of specimens used was estimated by X-ray line profile analysis to be about 100 nm. Two developed peaks in the internal friction spectrum were obtained at temperatures ≈ 370 K and ≈ 620 K. Influence of prestraining and annealing was observed. The activation energy of the low temperature peak was estimated to be 1.2 eV and its activation volume VD = 108 b3. The experimental results are analysed and discussed.