The dislocation distribution in copper after fatigue at elevated temperature

A qualitative explanation for the absence of hardening in the saturation region of the fatigue-hardening curve is proposed on the basis of observations of the spatial dislocation distribution and the distribution of Burgers vectors.We are indebted to the Ministry of Technology for financial support for this work. We are also very grateful to Dr. A. Gittins of the Central Electricity Research Laboratories who provided us with a number of fatigue specimens used in some preliminary experiments and to Dr. Saimoto of Queens University who provided details of his unpublished work.