119. Non-Destructive Testing of Cast Magnesium Alloys by Computerized Tomography

  1. Prof. Dr. K. U. Kainer
  1. Dr. Bernhard Illerhaus1,
  2. Dr. Norbert Hort2,
  3. Dr. Carsten Potzies2,
  4. Hagen Frank2 and
  5. Dr. Jürgen Goebbels1

Published Online: 22 APR 2005

DOI: 10.1002/3527603565.ch119

Magnesium: Proceedings of the 6th International Conference Magnesium Alloys and Their Applications

Magnesium: Proceedings of the 6th International Conference Magnesium Alloys and Their Applications

How to Cite

Illerhaus, B., Hort, N., Potzies, C., Frank, H. and Goebbels, J. (2003) Non-Destructive Testing of Cast Magnesium Alloys by Computerized Tomography, in Magnesium: Proceedings of the 6th International Conference Magnesium Alloys and Their Applications (ed K. U. Kainer), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527603565.ch119

Editor Information

  1. GKSS-Forschungszentrum, Institut für Werkstoffforschung, Max-Planck-Straße, 21502 Geesthacht, Germany

Author Information

  1. 1

    Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin, Germany

  2. 2

    GKSS-Forschungszentrum GmbH, Geesthacht, Germany

Publication History

  1. Published Online: 22 APR 2005
  2. Published Print: 27 NOV 2003

ISBN Information

Print ISBN: 9783527309757

Online ISBN: 9783527603565

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Keywords:

  • non-destructive testing;
  • cast magnesium alloys;
  • computerized tomography

Summary

Beside several favourable properties, like high specific strength and damping capacity, most magnesium alloys also exhibit an excellent castability and are therefore usually fabricated by high pressure die casting. Due to the high casting speed, the melt flow is non-laminar and air can be entrapped during the casting process causing porosity when the melt solidifies. The volume fraction of porosity can be up to 4%. Porosity highly influences the mechanical properties, reducing significantly the values of elongation, tensile strength and especially fatigue strength [1-5]. Additionally, no heat treatment is possible to reach the optimum mechanical properties of the material. An alternative casting technology to reduce porosity is the Thixomolding process where the material is cast in the semi-solid state.

Different methods of non-destructive testing are possible to detect and remove affected components to ensure using components with a low content of porosity. One alternative of evaluating the porosity is the computerized tomography (CT). The CT enables a 3-dimensional view of the cast component.