Normal and abnormal grain growth (IMAGE) Lehigh University Caption In this image, several microstructures associated with specialty aluminas show the effects of both normal and abnormal grain growth. Credit Prof. Jeffrey Rickman, Lehigh University Usage Restrictions no restriction 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.