Stress corrosion of U alloys
Creators
- 1. CEA Centre d'Etudes de Bruyeres-le-Chatel, 92 - Montrouge (France)
Description
Uranium-molybdenum alloys with body-centered cubic structure are subject to stress corrosion in air at room temperature. This phenomenon is observed particularly during tensile tests and during toughness measurements above a critical velocity. The investigation of initiation, propagation and sudden fracture phases shows that stress corrosion depends on several structural parameters, and falls with increasing molybdenum content. Ternary addition elements such as titanium and zirconium have no influence on resistance to crack propagation. Tests conducted in different environments show that stress corrosion is the same in water and in air , but that the crack velocity increases with moisture content. In oxygen, the stress corrosion decreases and the crack velocity is very low. In nitrogen, the material is not embrittled. Test results in hydrogen are given. The morphology of cracking is described. Theories of fracture of a brittle film and of embrittlement can cover these observations
Abstract (French)
Les alliages uranium-molybdene de structure cubique centree sont sujets a la corrosion sous contrainte dans l'air et a la temperature ambiante. Ce phenomene est observe en particulier au cours d'essais de traction et de mesure de la tenacite au-dessus d'une vitesse critique. L'etudes des stades d'initiation, de propagation et de rupture brutale montre que la susceptibilite est fonction de plusieurs parametres structuraux et qu'elle diminue lorsque la teneur en molybdene augmente. Des elements d'addition ternaire tels que le titane et le zirconium n'ont pas d'influence sur la resistance a la propagation. Des essais dans differents environnements montrent que la susceptibilite est la meme dans l'eau et dans l'air, mais que la vitesse de fissuration augmente avec la teneur en vapeur d'eau. Dans l'oxygene, la susceptibilite diminue et la vitesse est tres faible. Dans l'azote, le materiau n'est pas fragilise. Les resultats d'essais dans l'hydrogene sont presentes. La morphologie de la fissuration est decrite. Les theories de la rupture d'un film fragile et de la fragilisation peuvent rendre compte de ces observationsAdditional details
Additional titles
- Original title (French)
- Corrosion sous contrainte d'alliages d'uranium inoxydables
Publishing Information
- Publisher
- Institut National des Sciences et Techniques Nucleaires.
- Imprint Place
- Saclay, France
- ISBN
- 272720003X
- Imprint Title
- 17. Colloquium on metallurgy. Mechanical and metallurgical factors of fracture, particularly in nuclear industry. Saclay, 24-26 June 1974
- Imprint Pagination
- p. 559-615.
Conference
- Title
- 17. Colloquium on metallurgy. Mechanical and metallurgical factors of fracture, particularly in nuclear industry.
- Dates
- 24 Jun 1974.
- Place
- Saclay, France.
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 7236413
- Subject category
- S36: MATERIALS SCIENCE; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- AIR; CRACKS; FRACTURE PROPERTIES; HYDROGEN; MOLYBDENUM ALLOYS; NITROGEN; OXYGEN; STRESS CORROSION; URANIUM BASE ALLOYS; WATER
- Descriptors DEC
- ACTINIDE ALLOYS; ALLOYS; CHEMICAL REACTIONS; CORROSION; ELEMENTS; FLUIDS; GASES; HYDROGEN COMPOUNDS; MECHANICAL PROPERTIES; NONMETALS; OXYGEN COMPOUNDS; TRANSITION ELEMENT ALLOYS; URANIUM ALLOYS
Optional Information
- Notes
- Imprint:17. Colloque de metallurgie. Facteurs mecaniques et metallurgiques de la rupture, notamment dans l'industrie nucleaire. Saclay, 24-26 juin 1974.