Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-109-C5-114
INTERNAL FRICTION OF DEFORMED IRON CONTAINING HYDROGENK. Sakamoto et M. Shimada
Department of Applied Physics, Faculty of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
Internal friction of the deformed and hydrogen doped α-Fe shows three peaks near 130K, 170K and 330K at 1 Hz. The 130K and 170K peaks are hydrogen cold work peaks and the 330K peak is a γ-peak. Activation energies of 0.22 eV and 0.35 eV were obtained for the 130K and 170K peaks, respectively. The 130K peak may be due to the interaction between nonscrew dislocations and hydrogen atoms and the 170K peak due to the interaction between nonscrew dislocations and aggregated hydrogen atoms on the nonscrew dislocations. Electrolytic hydrogen charging experiments indicate that the dislocation structure alters during the charging.