Metallographic characterization of internal borescope indications in a turbine blade made of alloy 247 LC DS
Abstract Internal visual testing (VT) indications were detected by a casting supplier in the development phase of a new turbine blade type. It was determined that the peculiar surface indications were caused by a phenomenon called hafnium wrinkling . Both past experience, and modern characterization methods were used to determine the cause of the indications.
Authors
- A. Neidel
- M. Giller
- B. Fischer (ORCID: https://orcid.org/0000-0001-9737-0056)
Institutions
- Siemens (Germany) (DE)
Publication Details
- Journal
- Practical Metallography
- Published
- 2025-10-01
- DOI
- https://doi.org/10.1515/pm-2025-0074
- Primary Topic
- High Temperature Alloys and Creep
- Type
- article
- Field-Weighted Citation Impact
- 0.00