A micromechanical analysis of intergranular stress corrosion cracking of an irradiated austenitic stainless steel
| Autor: | A. Courcelle, D. Liang, J. Hure, Benoit Tanguy, S. El Shawish |
|---|---|
| Přispěvatelé: | Service d'Etudes des Matériaux Irradiés (SEMI), 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, Laboratoire de Comportement Mécanique des Matériaux Irradiés (LCMI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Département des Matériaux pour le Nucléaire (DMN), Laboratoire de Microscopie et d'Etudes de l'Endommagement (LM2E), Jozef Stefan Institute [Ljubljana] (IJS), The authors gratefully acknowledge financial support provided by Slovenian Research Agency (grant P2-0026) and French Atomic Energy Commission., CEA- Saclay (CEA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymers and Plastics Austenitic stainless steel EBSD FOS: Physical sciences 02 engineering and technology Slip (materials science) engineering.material 01 natural sciences FFT [SPI]Engineering Sciences [physics] 0103 physical sciences Composite material Stress corrosion cracking Intergranular 010302 applied physics Condensed Matter - Materials Science Metals and Alloys Materials Science (cond-mat.mtrl-sci) [CHIM.MATE]Chemical Sciences/Material chemistry Intergranular corrosion 021001 nanoscience & nanotechnology Microstructure Electronic Optical and Magnetic Materials Cracking Ceramics and Composites engineering Grain boundary 0210 nano-technology Electron backscatter diffraction |
| Zdroj: | Acta Materialia Acta Materialia, 2021, pp.116482. ⟨10.1016/j.actamat.2020.116482⟩ Acta Materialia, Elsevier, 2021, 204, pp.116482-. ⟨10.1016/j.actamat.2020.116482⟩ Acta Materialia, 2021, 204, pp.116482. ⟨10.1016/j.actamat.2020.116482⟩ |
| ISSN: | 1359-6454 |
| DOI: | 10.1016/j.actamat.2020.116482⟩ |
| Popis: | International audience; Irradiation Assisted Stress Corrosion Cracking (IASCC) is a material degradation phenomenon affecting austenitic stainless steels used in nuclear Pressurized Water Reactors (PWR), leading to the initiation and propagation of intergranular cracks. Such phenomenon belongs to the broader class of InterGranular Stress Corrosion Cracking (IGSCC). A micromechanical analysis of IGSCC of an irradiated austenitic stainless steel is performed in this study to assess local cracking conditions. A 304L proton irradiated sample tested in PWR environment and showing intergranular cracking is investigated. Serial sectioning, Electron BackScatter Diffraction (EBSD) and a two-step misalignment procedure are performed to reconstruct the 3D microstructure over an extended volume, to assess statistically cracking criteria. A methodology is alsodeveloped to compute Grain Boundary (GB) normal orientations based on the EBSD measurements. The statistical analysis shows that cracking occurs preferentially for GB normals aligned with the mechanical loading axis, but also for low values of the Luster-Morris slip transmission parameter. Micromechanical simulations based on the reconstructed 3D microstructure, FFT-based solver and crystal plasticity constitutive equations modified to account for slip transmission at grain boundaries are finally performed. These simulations rationalize the correlation obtained experimentally into a single stress-based criterion. The actual strengths and weaknesses of such micromechanical approach are discussed. |
| Databáze: | OpenAIRE |
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