The influence of the cooling bores on crystal orientation and lattice parameter in single-crystalline cored turbine blades
Authors:
- Jacek Krawczyk,
- Włodzimierz Bogdanowicz,
- Jan Sieniawski
Abstract
The areas located near the cooling bores of single-crystalline cored turbine blades made of nickel-based CMSX-4 superalloy were studied. The blades were solidified by the vertical Bridgman technique in the industrial ALD furnace. Longitudinal sections of the blades were studied by Scanning Electron Microscopy, X-ray diffraction topography, X-ray diffraction measurements of the γ′-phase lattice parameter a, and the α angle of the primary crystal orientation. The local changes in α were analyzed in relation to the changes of the dendrite’s growth direction near the cooling bores. It was found that in the area approximately 3 ÷ 4 mm wide around the cooling bores, changes of α and a, both in the blade root and in the airfoil occurred. The local temperature distribution near the cooling bores formed a curved macroscopic solidification front, which caused changes in the chemical composition and, consequently, changes in the a value in a range of 0.002 Å to 0.014 Å. The mechanism of alloying elements segregation by tips of the dendrites on the bent solidification front was proposed. The multi-scale analysis that allows determining a relation between processes proceed both on a millimeter-scale and a micrometric and nanometric scale, was applied in the studies.
- Record ID
- USLd3d8bb8501ea4f798d4fca79cba91569
- Author
- Journal series
- Materials, ISSN 1996-1944
- Issue year
- 2021
- No
- 14
- Pages
- 1-15
- Publication size in sheets
- 0.70
- Article number
- 3842
- Keywords in English
- single-crystalline cored blades, low-angle boundaries, lattice parameter, x-ray topography, elements segregation
- ASJC Classification
- DOI
- DOI:10.3390/ma14143842 Opening in a new tab
- Handle.net URL
- hdl.handle.net/20.500.12128/20621 Opening in a new tab
- Language
- eng (en) English
- License
- File
-
- File: 1
- The influence of the cooling bores on crystal orientation and lattice parameter in single-crystalline cored turbine blades, File Krawczyk_Bogdanowicz_the_influence_of_the_cooling.pdf / 2 MB
- Krawczyk_Bogdanowicz_the_influence_of_the_cooling.pdf
- publication date: 06-02-2024
- The influence of the cooling bores on crystal orientation and lattice parameter in single-crystalline cored turbine blades, File Krawczyk_Bogdanowicz_the_influence_of_the_cooling.pdf / 2 MB
-
- Score (nominal)
- 140
- Score source
- journalList
- Score
- = 140.0, 26-09-2023, ArticleFromJournal
- Publication indicators
- PubMed ID
- 34300761 Opening in a new tab
- Uniform Resource Identifier
- https://opus.us.edu.pl/info/article/USLd3d8bb8501ea4f798d4fca79cba91569/
- URN
urn:uni-kat-prod:USLd3d8bb8501ea4f798d4fca79cba91569
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.