3D fatigue crack image (IMAGE) National Institute for Materials Science, Japan Caption Figure. Three-dimensional imaging of a metal sample with a fatigue crack (left) and the crack growth mechanism revealed in this research (upper right) as opposed to the conventionally assumed mechanism (lower right) Credit Hideaki Nishikawa National Institute for Materials Science Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.