71. Fatigue Life Prediction of Magnesium Alloys for Structural Applications

  1. Prof. Dr. K. U. Kainer
  1. Yukio Miyashita,
  2. Zainuddin bin Sajuri,
  3. Takashi Umehara and
  4. Yoshiharu Mutoh

Published Online: 22 APR 2005

DOI: 10.1002/3527603565.ch71

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

Miyashita, Y., Sajuri, Z. b., Umehara, T. and Mutoh, Y. (2005) Fatigue Life Prediction of Magnesium Alloys for Structural Applications, 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.ch71

Editor Information

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

Author Information

  1. Nagaoka University of Technology, Nagaoka, Japan

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:

  • magnesium alloys;
  • fatigue life prediction;
  • structural application

Summary

Since high fatigue reliability of magnesium alloys is essential to their structural applications, it is relevant to make clear their fatigue characteristics. In the previous study on fatigue behavior of an extruded AZ61 under wide range of ambient humidity conditions [1], it was found that corrosion pits were formed and subsequently fatigue cracks were nucleated from the pits at applied stresses below the fatigue limit under higher humid condition. Die cast magnesium alloys have been widely utilized in many applications due to their advantages, such as near-net-shape forming, reduction of welding and machining processes and low cost. Inherent flows in die cast materials, size and shape of which depend on the casting process, significantly reduce the fatigue strength. In the present study, fatigue life prediction of magnesium alloys based on fracture mechanics approach has been made, where the pit depth for an extruded AZ61 at high humidity and the inherent defect diameter for a die cast AZ91D have been assumed as the initial crack size.