The papers contained in this proceedings were presented at the symposium, Fourth International Conference on Very High Cycle Fatigue (VHCF-4), held at the University of Michigan, Ann Arbor, Michigan, USA, August 19-22, 2007. The objective of VHCF-4 was to provide an opportunity for the global fatigue community to present and discuss the latest experimental and theoretical research on the fatigue behavior of structural materials in the very high cycle regime. Specific topics covered include:

• Microstructure
• Initiation Mechanisms, Survace vs. Subsurface Initiation
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