Magnesium SiC Reinforced Composites – Texture and Residual Strain Investigation by Simulation and Experiments

  1. Prof. Dr.-Ing. K. U. Kainer
  1. H.-G. Brokmeier1,
  2. E. M. Jansen1,
  3. P. Spalthoff2,
  4. J. A. Signorelli3,
  5. P. A. Turner3 and
  6. R. E. Bolmaro3

Published Online: 15 MAY 2006

DOI: 10.1002/3527607552.ch26

Magnesium Alloys and their Applications

Magnesium Alloys and their Applications

How to Cite

Brokmeier, H.-G., Jansen, E. M., Spalthoff, P., Signorelli, J. A., Turner, P. A. and Bolmaro, R. E. (2000) Magnesium SiC Reinforced Composites – Texture and Residual Strain Investigation by Simulation and Experiments, in Magnesium Alloys and their Applications (ed K. U. Kainer), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607552.ch26

Editor Information

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

Author Information

  1. 1

    IWWTU Clausthal and GKSS-Forschungszentrum Geesthacht, Geesthacht-Germany

  2. 2

    IGDL-Univ. Göttingen and FLNP-JINR Dubna-Russia

  3. 3

    Instituto de Física Rosario, Rosario-Argentina

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 SiC reinforced composites;
  • texture;
  • residual strain

Summary

In highly plastic anisotropic materials the manufacturing processes lead to inter-granular residual stresses at the polycrystalline level. These are superimposed to the macroscopic residual stresses and remain in the material when neither applied stress nor macro-stresses are present. Later, the residual stresses will affect the response under operation. When composites are produced by thermo-mechanical treatment of metals and ceramic particles the resultant behavior is due to a complex interaction between elastic, thermal and plastic properties of each constituent. Powder metallurgy techniques were used by mixing Mg-powder of 30 µm average diameter and SiC-particles of 8 µm average diameter. Pure Mg, 10 % SiC-Mg and 20 % SiC-Mg were deformed until a Von Mises equivalent deformation of 3.00 at 300 °C (one set) or 350 °C (another set) and later air-cooled. Texture measurements were performed at TEX-2 GKSS-Geesthacht, Germany, and residual strain measurements at SKAT JINR-Dubna, Russia. The experimental results are interpreted in terms of Elasto- and Visco-Plastic Self-Consistent models (EPSC and VPSC). The profiles of residual strains after extrusion show some qualitative differences between both models and a non linear dependence with the sample orientation. A second application of this kind of models is to infer the microscopic parameters that are compatible with the macroscopic observed results. The ratio between Critical Resolved Shear Stresses (CRSS) is evaluated by modeling and some hints about active deformation mechanisms are obtained.