Single-crystal (SX) components have superior thermomechanical properties, however, due to their high cost and limited lifespan, there arises a need for an adequate repair. Laser metal deposition is an established repair process, however, the difficulty in repairing SX components is achieving the same microstructure in the deposit as in the substrate. Optimal parameters were determined for the deposition of single clads in terms of percentage single-crystallinity and the incidence of defects. This strategy was extended to lateral as well as multi-layered deposits. It was deduced that for lateral, SX processing of structures, in order to maintain the growth of [001] dendrites, the maximum processing angle must be 35°. Using the optimal parameters determined, a strategy for multi-layered parts was developed to deposit structures with up to 94.2% single-crystallinity. It was shown that explanatory modelling using multiple linear regression combined with the consideration of process-specific quality metrics enables the determination of optimal process parameters.
Schlagworte
Publikation durchsuchen
Bibliographische Angaben
Copyrightjahr
2025
ISBN-Online
978-3-69030-159-6
Verlag
TEWISS, Garbsen
Reihe
Berichte aus dem LZH
Band
04/2025
Sprache
Deutsch
Seiten
96
Produkttyp
Monographie
Inhaltsverzeichnis
KapitelSeiten
Vorwort Kein Zugriff
Table of contents Kein Zugriff
List of symbols and abbreviations Kein Zugriff
1 Introduction Kein Zugriff Seiten 1 - 2
2.1 Nickel-based superalloys Kein Zugriff
2.2 Additive manufacturing Kein Zugriff
2.3 Laser metal deposition Kein Zugriff
2.4 Laser material processing of nickel-based superalloys Kein Zugriff
3 Scope and objective Kein Zugriff Seiten 21 - 22
4.1 Identification of process variables and responses Kein Zugriff
4.2 Experimental design Kein Zugriff
4.3 Experimental runs Kein Zugriff
4.4 Statistical analysis and interpretation Kein Zugriff
5.1 Experimental design Kein Zugriff
5.2 Geometrical properties Kein Zugriff
5.3 Microstructural properties Kein Zugriff
5.4 Optimal parameters Kein Zugriff
5.5 Summary of single clad processing Kein Zugriff
6.1 Experimental design Kein Zugriff
6.2 Processing angle Kein Zugriff
6.3 Summary of lateral processing Kein Zugriff
7.1 Experimental design Kein Zugriff
7.2 Deposition strategy and parameters Kein Zugriff
7.3 Conclusion Kein Zugriff
8.1 Single clads Kein Zugriff
8.2 Optimal processing parameters Kein Zugriff
8.3 Microstructure during SX processing Kein Zugriff
