IFIR   05409
INSTITUTO DE FISICA DE ROSARIO
Unidad Ejecutora - UE
artículos
Título:
Mechanical energy losses due to the movement of dislocations in molybdenum at high temperatures (0.3Tm)
Autor/es:
G.I. ZELADA-LAMBRI; O.A. LAMBRI; J.A. GARCÍA
Revista:
JOURNAL OF NUCLEAR MATERIALS
Editorial:
Elsevier
Referencias:
Año: 2006 vol. 353 p. 127 - 134
ISSN:
0022-3115
Resumen:
Damping measurements were performed, at around 1 Hz, in high purity single crystalline molybdenum from room temperature
up to 1273 K. The results showed that the intensity of the damping peak at around 8401050 K depended on the
degree of plastic deformation at room temperature. Moreover the peak temperature and activation energy of this relaxation
increased with the temperature of the previous annealing of the sample, and was independent of the crystal orientation.
In addition, once the damping peak appeared after annealing, the damping values were independent of the amplitude
of oscillation. Possible physical mechanisms involving dislocations interaction are discussed.
2006 Elsevier B.V. All rights reserved.2006 Elsevier B.V. All rights reserved.