144. Cast Magnesium Safety Components - Energy Absorption Capacity

  1. Prof. Dr. K. U. Kainer
  1. C. Dørum1,
  2. O.S. Hopperstad1,
  3. O.-G. Lademo2,
  4. M. Langseth1 and
  5. S. Sannes3

Published Online: 22 APR 2005

DOI: 10.1002/3527603565.ch144

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

Dørum, C., Hopperstad, O.S., Lademo, O.-G., Langseth, M. and Sannes, S. (2003) Cast Magnesium Safety Components - Energy Absorption Capacity, 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.ch144

Editor Information

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

Author Information

  1. 1

    Structural Impact Laboratory (SIMLab) Department of Structural Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway.

  2. 2

    SINTEF Materials Technology, 7465 Trondheim, Norway.

  3. 3

    Norsk Hydro ASA, 3907 Porsgrunn, Norway.

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:

  • cast magnesium safety components;
  • energy absorption capacity;
  • high pressure die casting (HPDC)

Summary

Growing concerns for economy, environment and functionality have led to increased use of light-metals in the load carrying structure and safety components of cars. With High Pressure Die Casting (HPDC) of magnesium and aluminium alloys, components with very complex, thin-walled geometry, like instrument panels, A and B pillars and front end structures, can be cast with a high production rate. The challenge with HPDC is to optimise the process parameters with respect to the part design and the solidification characteristics of the alloy in order to obtain a sound casting without casting defects. Unbalanced filling and lack of thermal control can cause porosity and surface defects due to turbulence and solidification shrinkage. These defects can give low ductility compared to for instance extruded materials.

To explore the possibilities for energy absorption in HPDC magnesium alloys, it was decided to investigate a different energy absorption principle, namely bolt shearing. In the automotive industry, this generic mechanism is already in use in extruded crash-boxes, but has not yet been utilised with respect to cast components.