Artículo
Defects interaction processes in deformed high purity polycrystalline molybdenum at elevated temperatures
Lambri, Osvaldo Agustin F.
; Bonifacich, Federico Guillermo
; Bozzano, Patricia Beatriz; Zelada, Griselda Irene; Plazaola, F; García, J.A.
Fecha de publicación:
06/2014
Editorial:
Elsevier Science
Revista:
Journal of Nuclear Materials
ISSN:
0022-3115
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Resumen
Mechanical spectroscopy (damping and elastic modulus as a function of temperature) and transmission electron microscopy studies have been performed in high purity polycrystalline molybdenum plastically deformed to different values of tensile and torsion strain. Mechanical spectroscopy measurements were performed from room temperature up to 1285 K. A relaxation peak in polycrystalline molybdenum related to the movement of dislocations into lower energy configurations near grain boundaries has been discovered to appear around 1170 K. The activation energy of the peak is 4.2 eV ± 0.5 eV. This relaxation phenomenon involves the interaction between vacancies and mobile dislocations near the grain boundaries. It should be highlighted that this relaxation process is controlled by the arrangement of vacancies and dislocations which occur at temperature below 1070 K
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - ROSARIO)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - ROSARIO
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - ROSARIO
Citación
Lambri, Osvaldo Agustin F.; Bonifacich, Federico Guillermo; Bozzano, Patricia Beatriz; Zelada, Griselda Irene; Plazaola, F; et al.; Defects interaction processes in deformed high purity polycrystalline molybdenum at elevated temperatures; Elsevier Science; Journal of Nuclear Materials; 453; 1-3; 6-2014; 1-7
Compartir
Altmétricas