Numéro
J. Phys. IV France
Volume 03, Numéro C7, Novembre 1993
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
Page(s) C7-591 - C7-596
DOI http://dx.doi.org/10.1051/jp4:1993797
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés

J. Phys. IV France 03 (1993) C7-591-C7-596

DOI: 10.1051/jp4:1993797

Plasticity of oxide dispersion strengthened ferritic alloys

C. ZAKINE1, C. PRIOUL2, A. ALAMO1 and D. FRANCOIS2

1  Service de Recherches Métallurgiques Appliquées, Commissariat à l'Energie Atomique, 91191 Saclay, France
2  Laboratoire MSS/Mat., URA 850 du CNRS, Ecole Centrale des Arts et Manufactures, Grande Voie des Vignes, 92295 Châtenay-Malabry cedex, France


Abstract
Two 13%Cr oxide dispersion strengthened (ODS) ferritic alloys, DT and DY, exhibiting different oxide particle size distribution and a X phase precipitation were studied. Their tensile properties have been tested from 20 to 700°C. Experimental observations during room temperature tensile tests performed in a scanning electronic microscope have shown that the main damage mechanism consists in microcraking of the X phase precipitates on grain boundaries. These alloys are high tensile and creep resistant between 500 and 700°C. Their strongly stress-sensitive creep behaviour can be described by usual creep laws and incorporating a threshold stress below which the creep rate is negligible.



© EDP Sciences 1993