Flow Mechanisms in Creep of an AZ 91 Magnesium-based Composite

  1. Prof. Dr.-Ing. K. U. Kainer
  1. Vaclav Sklenicka1,
  2. Marie Pahutova1,
  3. Kveta Kucharova1,
  4. Milan Svoboda1 and
  5. Terence G. Langdon2

Published Online: 15 MAY 2006

DOI: 10.1002/3527607552.ch38

Magnesium Alloys and their Applications

Magnesium Alloys and their Applications

How to Cite

Sklenicka, V., Pahutova, M., Kucharova, K., Svoboda, M. and Langdon, T. G. (2000) Flow Mechanisms in Creep of an AZ 91 Magnesium-based Composite, in Magnesium Alloys and their Applications (ed K. U. Kainer), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607552.ch38

Editor Information

  1. GKSS-Forschungszentrum Geesthacht GmbH, Institut für Werkstofforschung, Max-Planck- Straße, D-21502 Geesthacht, Germany

Author Information

  1. 1

    Institute of Physics of Materials, Academy of Sciences of the Czech Republic, CZ-616 62 Brno, Czech Republic

  2. 2

    Departments of Materials Science and Mechanical Engineering, University of Southern California, Los Angeles, CA 90089-1453, USA

Publication History

  1. Published Online: 15 MAY 2006
  2. Published Print: 20 SEP 2000

ISBN Information

Print ISBN: 9783527302826

Online ISBN: 9783527607556

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Keywords:

  • magnesium alloys;
  • magnesium matrix composites;
  • flow mechanisms in creep;
  • AZ 91 magnesium-based composite

Summary

At present, it is generally accepted that creep deformation in metal matrix composites is controlled by flow in the matrix materials. This conclusion is supported by very recent experimental results on a squeeze-cast AZ 91 alloy reinforced with 20 vol. % Al2O3 short fibres reported by Li et al. [12, 13]. When the creep data were interpreted by incorporation of a threshold stress σTH into the analysis, it was shown that the results are consistent with the behavior anticipated for magnesium solid solution alloys [14]. Thus, it can be suggested that the creep strengthening in the composite arises mainly from the existence of a threshold stress and the load transfer effect [5, 15]. The present study was therefore initiated in order to provide further information on the significance of the threshold stress in creep of the AZ 91 composite. Attention in this paper is focused primarily on the effect of temperature on the threshold stress.