Studies on mechanical behavior of MOD 9Cr-1Mo steel, CEA R&D program
| Autor: | Cabrillat, Marie-Therese, Reytier, Magali, Sauzay, Maxime, Mottot, Michel, Gaffard, Vincent, Seran, Jean-Louis, Billot, Philippe, Riou, Bernard |
|---|---|
| Přispěvatelé: | Service des Recherches Métallurgiques Appliquées (SRMA), Département des Matériaux pour le Nucléaire (DMN), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre des Matériaux (MAT), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Centre des Matériaux (CDM), Mines Paris - PSL (École nationale supérieure des mines de Paris) |
| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: | |
| Zdroj: | 2nd international topical meeting on high temperature reactor technology 2nd international topical meeting on high temperature reactor technology, 2004, Beijing, China. 13 p |
| Popis: | International audience; 9Cr-1Mo mod steel is one candidate material for the VHTR pressure vessel. Research programs have been undertaken at CEA to characterize the behavior of this steel and of its welded junctions in representative loading situations - fatigue, creep and creep-fatigue solicitations - with several objectives: definition and validation of design rules, characterization and validation of defect nocivity assessment methods, development of physically based behavior and damage models which can be used with confidence outside their identification domain, acquisition of missing data. Experimental and numerical programs have been undertaken in several fields: * Fatigue behavior in order to check if there is an influence of the mean stress on the fatigue life of the component and to propose design methods to take it into account if necessary. * Creep behavior and creep damage of the base metal (BM) and of the weld junctions, in order to identify the weak zones in creep situations, to characterize the behavior and the damage laws of the different zones of the weld junctions, and to provide rules and material data for the life assessment methods. * Cyclic behavior in the creep range in order to evaluate the influence of hold time on the fatigue life and to propose validated inelastic models based on the physical strain mechanisms. * Characterization of fatigue and creep crack growth laws for base metal and weld metal, and realization of tests on large components with defects either in BM or in the weld in order to validate the assessment procedures for the residual life estimation of cracked components. A description of these different programs is proposed, and the first results obtained are presented. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|