Neutrons -- Higher Efficiency Engines (IMAGE) DOE/Oak Ridge National Laboratory Caption From left, researchers Yi Liu from FCA US; Thomas Watkins with ORNL; Andres Rodriguez and Alejandro Gonzalez of Nemak; and Seyed Mirmiran with FCA US are part of a team using neutrons to compare residual stresses in engine cylinder heads made from different cast aluminum alloys. Credit Genevieve Martin/Oak Ridge National Laboratory, US Dept. of Energy 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.