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http://dx.doi.org/10.18419/opus-13404
Autor(en): | Acosta, Ruth Heckmann, Klaus Sievers, Jürgen Schopf, Tim Bill, Tobias Starke, Peter Donnerbauer, Kai Lücker, Lukas Walther, Frank Boller, Christian |
Titel: | Microstructure-based lifetime assessment of austenitic steel AISI 347 in view of fatigue, environmental conditions and NDT |
Erscheinungsdatum: | 2021 |
Dokumentart: | Zeitschriftenartikel |
Seiten: | 21 |
Erschienen in: | Applied sciences 11 (2021), No. 11214 |
URI: | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-134237 http://elib.uni-stuttgart.de/handle/11682/13423 http://dx.doi.org/10.18419/opus-13404 |
ISSN: | 2076-3417 |
Zusammenfassung: | The assessment of metallic materials used in power plants’ piping represents a big challenge due to the thermal transients and the environmental conditions to which they are exposed. At present, a lack of information related to degradation mechanisms in structures and materials is covered by safety factors in its design, and in some cases, the replacement of components is prescribed after a determined period of time without knowledge of the true degree of degradation. In the collaborative project “Microstructure-based assessment of maximum service life of nuclear materials and components exposed to corrosion and fatigue (MibaLeb)”, a methodology for the assessment of materials’ degradation is being developed, which combines the use of NDT techniques for materials characterization, an optimized fatigue lifetime analysis using short time evaluation procedures (STEPs) and numerical simulations. In this investigation, the AISI 347 (X6CrNiNb18-10) is being analyzed at different conditions in order to validate the methodology. Besides microstructural analysis, tensile and fatigue tests, all to characterize the material, a pressurized hot water pipe exposed to a series of flow conditions will be evaluated in terms of full-scale testing as well as prognostic evaluation, where the latter will be based on the materials’ data generated, which should prognose changes in the material’s condition, specifically in a pre-cracked stage. This paper provides an overview of the program, while the more material’s related aspects are presented in the subsequent paper. |
Enthalten in den Sammlungen: | 13 Zentrale Universitätseinrichtungen |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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applsci-11-11214-v2.pdf | 7,02 MB | Adobe PDF | Öffnen/Anzeigen |
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