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A mechanical analysis of metallic tritide aging by helium bubble growth
- Source :
- Materials Science and Engineering: A, Materials Science and Engineering: A, 2008, 494 (1-2), pp.407-415. ⟨10.1016/j.msea.2008.04.033⟩, Materials Science and Engineering: A, Elsevier, 2008, 494 (1-2), pp.407-415. ⟨10.1016/j.msea.2008.04.033⟩
- Publication Year :
- 2008
- Publisher :
- HAL CCSD, 2008.
-
Abstract
- International audience; A simple mechanical model is proposed for the aging of a metallic tritide. The material is assumed to be elastic-power law viscoplastic. Part of the helium atoms generated by tritium decay form spherical bubbles that weaken the elastic moduli of the overall material. By contrast others can be stored in solid, solution in the matrix and are likely to increase the moduli. Two variants of the model are compared, assuming either instantaneous or finite rate diffusion of helium. They predict globally similar evolutions of the gas pressure inside the bubbles, the geometrical parameters (bubble radius, overall swelling), as well as the matrix and overall elastic moduli. The results are in good agreement with atomistic calculations of the pressure evolution. Furthermore, recent experimental measurements of the Young modulus changes during aging are better reproduced when He diffusion rate is finite, thus supporting the second variant of the model.
- Subjects :
- Materials science
Diffusion
Bubble
chemistry.chemical_element
Thermodynamics
Young's modulus
02 engineering and technology
01 natural sciences
010305 fluids & plasmas
Moduli
[SPI.MAT]Engineering Sciences [physics]/Materials
symbols.namesake
Analytical methods
0103 physical sciences
General Materials Science
Elastic modulus
Helium
Viscoplasticity
Continuum mechanics
Mechanical Engineering
Hydrides
Radius
021001 nanoscience & nanotechnology
Condensed Matter Physics
Damage
PALLADIUM TRITIDE
chemistry
Mechanics of Materials
symbols
TEM
0210 nano-technology
STORAGE
Subjects
Details
- Language :
- English
- ISSN :
- 09215093
- Database :
- OpenAIRE
- Journal :
- Materials Science and Engineering: A, Materials Science and Engineering: A, 2008, 494 (1-2), pp.407-415. ⟨10.1016/j.msea.2008.04.033⟩, Materials Science and Engineering: A, Elsevier, 2008, 494 (1-2), pp.407-415. ⟨10.1016/j.msea.2008.04.033⟩
- Accession number :
- edsair.doi.dedup.....00926c7c56b221ed16ce33ec3073d34f