Interaction Processes between Vacancies and Dislocations in Molybdenum in the Temperature Range Around 0.3 of the Melting Temperature

G. I. ZELADA-LAMBRI; O. A. LAMBRI; P. B. BOZZANO; J. A. GARCÍA; C. A. CELAURO

JOURNAL OF NUCLEAR MATERIALS

Elsevier

Año: 2008 vol. 380 p. 111 - 119

0022-3115

Mechanical spectroscopy, electrical resistivity and transmission electron microscopy studies have been performed on pre-strained neutron irradiated single crystalline molybdenum in order to check the interaction processes between vacancies and dislocations in the temperature range between room temperature and 1273 K. The anelastic relaxation in molybdenum which appears between 800 K and 1273 K has been separated in two different physical mechanisms depending on the temperature of appearance of the relaxation peak. The physical mechanism which controls the damping peak appearing at around 800 K was related with the dragging of jogs by the dislocation under movement assisted by vacancy diffusion. The damping peak which appears at higher temperatures of about 1000 K was more consistent with the formation and diffusion of vacancies assisted by the dislocation movement.