Number of the records: 1
Non-destructive sans investigation of in 738 turbine blades after high-temperature operation
- 1.
SYSNO ASEP 0105647 Document Type G - Proceedings (int. conf.) R&D Document Type Není vybrán druh dokumentu Title Non-destructive sans investigation of in 738 turbine blades after high-temperature operation Title Nedestruktivní SANS vyšetřování 738 turbinových lopatek po práci při vysoké teplotě Author(s) Marinčák, Vojtěch (UJF-V)
Strunz, Pavel (UJF-V) RID, ORCID, SAI
Šaroun, Jan (UJF-V) RID, ORCID, SAI
Ryukhtin, Vasyl (UJF-V) RID, ORCID, SAI
Lukáš, Petr (UJF-V) RID, ORCID, SAI
Cassi, L. (IT)
Ceschini, G. F. (IT)
Rogante, M. (IT)Issue data Geneva, 2003 Number of pages 6 s. Publication form CD - CD Action Proceedings of the International Conference of Mechanical Behaviour of Materials. Event date 25.05.2003-29.05.2003 VEvent location Geneve Country CH - Switzerland Event type WRD Language eng - English Country CH - Switzerland Keywords superalloy ; SANS Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects KSK1010104 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GA202/03/0891 GA ČR - Czech Science Foundation (CSF) Annotation The gas reactor turbine blades produced from the Inconel 738 nickel-base superalloy were studied with the aim to assess the influence of high-temperature operation fatigue on the microstructure. High-resolution small-angle neutron scattering (SANS) provides an unique possibility of non-destructive characterization of precipitates in the blades. Two turbine blades in as-cast state and after operation were compared at different positions along their edge, where different thermal and stress loads are expected. Size distributions and relative volume fractions of gamma´-precipitates were evaluated from measured SANS spectra for each blade and individual position. It was found that the precipitate volume fraction increases towards the tip of both blades. The blade after operation exhibits a significant increase of the average size and volume of precipitates with respect to the as-cast blade, which can be explained by expected stronger precipitate coarsening under higher stresses. The precipitate size varied along the blade in the as-cast state. The first results indicate that the SANS method would be a very useful tool for non-destructive testing of fatigue in turbine blades. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2005
Number of the records: 1