Internal-Friction Study of Recrystallization in Pure Iron and Its Dilute Alloys

Abstract

Recovery of high-temperature internal friction has been used as a means of studying recrystallization and lattice reorganization after cold working. Based on damping measurements at 1 Hz, this method is successful in detecting the solute effects produced by small additions of Ti, V, Co, and Ni (10–200 ppm (at.)) to pure iron (99.998%). The variation in activation-energy values for high-temperature internal friction of iron (10–29 kcal/g atom, 42–120 kJ/g atom) occurring under different conditions of cold working or annealing supports the hypothesis of a strict dependence of high-temperature internal friction on self-diffusion.