Grain Boundaries 1 (IMAGE) Lehigh University Caption Figure 1a. The microstructure for an Al film. A representative microstructure for an Al film that was annealed for 150 min at a temperature T = 400 °C. Grain colors reflect crystallographic orientations. Credit Courtesy of Lehigh University Usage Restrictions No restrictions. License CC0 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.