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A micromechanical interpretation of the temperature dependence of Beremin model parameters for french RPV steel
- Source :
- Journal of Nuclear Materials, Journal of Nuclear Materials, 2010, 406 (1), pp.97-112. ⟨10.1016/j.jnucmat.2010.02.025⟩, Journal of Nuclear Materials, Elsevier, 2010, 406 (1), pp.97-112. ⟨10.1016/j.jnucmat.2010.02.025⟩
- Publication Year :
- 2010
- Publisher :
- HAL CCSD, 2010.
-
Abstract
- International audience; Local approach to brittle fracture for low-alloyed steels is discussed in this paper. A bibliographical introduction intends to highlight general trends and consensual points of the topic and evokes debatable aspects. French RPV steel 16MND5 (equ. ASTM A508 Cl.3), is then used as a model material to study the influence of temperature on brittle fracture. A micromechanical modelling of brittle fracture at the elementary volume scale already used in previous work is then recalled. It involves a multiscale modelling of microstructural plasticity which has been tuned on experimental inter-phase and inter-granular stresses heterogeneities measurements. Fracture probability of the elementary volume can then be computed using a randomly attributed defect size distribution based on realistic carbides repartition. This defect distribution is then deterministically correlated to stress heterogeneities simulated within the microstructure using a weakest-link hypothesis on the elementary volume, which results in a deterministic stress to fracture. Repeating the process allows to compute Weibull parameters on the elementary volume. This tool is then used to investigate the physical mechanisms that could explain the already experimentally observed temperature dependence of Beremin's parameter for 16MND5 steel. It is showed that, assuming that the hypothesis made in this work about cleavage micro-mechanisms are correct, effective equivalent surface energy (i.e. surface energy plus plastically dissipated energy when blunting the crack tip) for propagating a crack has to be temperature dependent to explain Beremin's parameters temperature evolution.
- Subjects :
- Nuclear and High Energy Physics
Work (thermodynamics)
Materials science
02 engineering and technology
[SPI.MECA.MSMECA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Materials and structures in mechanics [physics.class-ph]
Plasticity
[SPI.MAT]Engineering Sciences [physics]/Materials
Stress (mechanics)
[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph]
brittle fracture
16MND5
0203 mechanical engineering
[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]
medicine
General Materials Science
micromechanic
Weibull distribution
Fissure
temperature
Mechanics
Dissipation
[PHYS.MECA.MSMECA]Physics [physics]/Mechanics [physics]/Materials and structures in mechanics [physics.class-ph]
021001 nanoscience & nanotechnology
Multiscale modeling
multiscale modeling
Beremin
020303 mechanical engineering & transports
medicine.anatomical_structure
low-alloyed steel
Nuclear Energy and Engineering
Fracture (geology)
0210 nano-technology
local approach to fracture
Subjects
Details
- Language :
- English
- ISSN :
- 00223115
- Database :
- OpenAIRE
- Journal :
- Journal of Nuclear Materials, Journal of Nuclear Materials, 2010, 406 (1), pp.97-112. ⟨10.1016/j.jnucmat.2010.02.025⟩, Journal of Nuclear Materials, Elsevier, 2010, 406 (1), pp.97-112. ⟨10.1016/j.jnucmat.2010.02.025⟩
- Accession number :
- edsair.doi.dedup.....66ed525d2962e4ded82b1a9a4dfcc34f