The work presented in the publication Metal Fatigue Damage—Mechanism, Detection, Avoidance, and Repair was sponsored by the ASTM-ASME Joint Committee on the Effect of Temperature on the Properties of Metals and financed by The Metal Properties Council. The Applied Research Panel under the Chairmanship of M. Semchyshen and the Gas Turbine Panel Chaired by G. J. Wile, cooperated in this project. Mr. S. S. Manson, who headed the Task Group under the Applied Research Panel, was responsible for the coordination of the papers presented in this publication.