Local Mechanical Behavior (IMAGE) U.S. Army Research Laboratory Caption This is the local mechanical behavior of the structure at various stages of fatigue cycling, as determined through depth sensing indentation. Credit U.S. Army Research Laboratory Usage Restrictions None License Licensed 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.