Model of Indentation Creep in Fiber Reinforced MMC Alloys

  1. B. Jouffrey
  1. G. Cseh1,
  2. J. Lendvai1,
  3. W. Berger2,
  4. H.-J. Gudladt2 and
  5. J. Bär2

Published Online: 9 MAY 2006

DOI: 10.1002/3527606165.ch31

Microstructural Investigation and Analysis, Volume 4

Microstructural Investigation and Analysis, Volume 4

How to Cite

Cseh, G., Lendvai, J., Berger, W., Gudladt, H.-J. and Bär, J. (2000) Model of Indentation Creep in Fiber Reinforced MMC Alloys, in Microstructural Investigation and Analysis, Volume 4 (ed B. Jouffrey), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527606165.ch31

Author Information

  1. 1

    Eötvös University, Budapest, Hungary

  2. 2

    Universität der Bundeswehr München, Neubiberg, Germany

Publication History

  1. Published Online: 9 MAY 2006
  2. Published Print: 20 APR 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301218

Online ISBN: 9783527606160



  • microstructural investigation;
  • metal matrix composites;
  • indentation creep;
  • fiber reinforced MMC alloys


Based on the movement of dislocations a creep model for short fiber reinforced MMCs was proposed by Dlouhy et al. In this model steady state creep is assumed to be the result of the balance of the hardening and recovery processes. The hardening is supposed to be due to the formation of Orowan loops. In the recovery the dislocation loops move towards the fiber ends in a combination of climb and glide, and reaching the fiber end the loops shrink and annihilate. In this model the steady state creep is controlled by dislocation climb, and the energy of self diffusion is taken as the activation energy of the creep. During the deformation the fracture of fibers was explained by the tensile stress in the fibers taken effect by the Orowan loops. Although in tertiary creep this damage mechanism is the most significant effect, it is present at each stage of deformation. In tensile creep tests of Dlouhy et al. the rupture of the samples occurs at 2–3 % of deformation. Applying indentation creep much larger equivalent deformation and microstructural damage can be achieved. This permits the creation of a model, which describes the indentation creep behavior of short fiber reinforced MMCs satisfactory.