Metallographic characterization of internal borescope indications in a turbine blade made of alloy 247 LC DS
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B. Fischer
Boromir Fischer completed a training as State Certified Technical Assistant for Metallography and Physical Material Analysis at Lette-Verein in Berlin. He has worked in the metallographic laboratory of the Siemens Gas Turbine Plant (Siemens-Gasturbinenwerk) Berlin for more than a decade. The key areas of his work are failure analysis and microstructural examinations using the field emission scanning electron microscope.Madeleine Giller Apprenticeship as a materials testing technician at the welding institute SLV Berlin-Brandenburg. After that, she studied materials science at the Berlin Institute of Technology. She graduated with a masters degree in materials science in 2012. Since November 2012 employment as engineer at the Metallography Laboratory of the Siemens Gas Turbine Works in Berlin. She has been appointed laboratory manager within the Berlin Testing Center of the Large Gas Turbine Engineering Group in 2014. Her main fields of expertise comprise failure analysis and microstructural investigations using the field emission scanning electron microscope.
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.
Kurzfassung
Ein Gussteilzulieferer stellte während der Entwicklungsphase Anzeigen in der internen Sichtprüfung bei einem neuen Turbinenschaufeltyp fest. Es zeigte sich, dass die ungewöhnlichen Oberflächenanzeigen durch ein Phänomen namens „Hafnium-Wrinkling“ verursacht wurden. Zur Ermittlung der Ursache der Anzeigen wurden sowohl Erfahrungen aus der Vergangenheit als auch moderne Charakterisierungsmethoden herangezogen.
About the authors
Boromir Fischer completed a training as State Certified Technical Assistant for Metallography and Physical Material Analysis at Lette-Verein in Berlin. He has worked in the metallographic laboratory of the Siemens Gas Turbine Plant (Siemens-Gasturbinenwerk) Berlin for more than a decade. The key areas of his work are failure analysis and microstructural examinations using the field emission scanning electron microscope.
Madeleine Giller Apprenticeship as a materials testing technician at the welding institute SLV Berlin-Brandenburg. After that, she studied materials science at the Berlin Institute of Technology. She graduated with a masters degree in materials science in 2012. Since November 2012 employment as engineer at the Metallography Laboratory of the Siemens Gas Turbine Works in Berlin. She has been appointed laboratory manager within the Berlin Testing Center of the Large Gas Turbine Engineering Group in 2014. Her main fields of expertise comprise failure analysis and microstructural investigations using the field emission scanning electron microscope.
References / Literatur
[1] Neidel, A. et al.: Internal report BLN MT/2023/0451, Berlin, December 11, 2023.Search in Google Scholar
[2] Neidel, A.; Fischer, B.: Metallographic Investigation of Internal Borescope Indications… Internal report BLN MT/2024/0185, Berlin, May 31, 2024.Search in Google Scholar
[3] Fontana, E.: Anomaly Characterization. Report Number ACR-2021-00091. Howmet Aerospace, Whitehall, MI, USA, February 18, 2021.Search in Google Scholar
[4] Walz, G.; Pickert, U.: Haze Issues in Alloy 247 DS. Mülheim an der Ruhr, January 2010.Search in Google Scholar
[5] Maier, H. J.; Niendorf, T.; Bürgel, R.: Hochtemperatur-Werkstofftechnik. Springer Fachmedien Wiesbaden, 5. Auflage 2015, S. 403. DOI:10.1007/978-3-658-10591-410.1007/978-3-658-10591-4Search in Google Scholar
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Articles in the same Issue
- Contents
- Editorial
- Editorial
- High-temperature microscopy on laser-welded copper-aluminum mixed joints – a challenge for metallographic preparation
- Influence of heat treatments of an HDSS alloy on the microstructure and corrosion behavior
- Failure Analysis
- Metallographic characterization of internal borescope indications in a turbine blade made of alloy 247 LC DS
- Picture of the Month
- Picture of the Month
- News
- News
- Meeting diary
- Meeting Diary
Articles in the same Issue
- Contents
- Editorial
- Editorial
- High-temperature microscopy on laser-welded copper-aluminum mixed joints – a challenge for metallographic preparation
- Influence of heat treatments of an HDSS alloy on the microstructure and corrosion behavior
- Failure Analysis
- Metallographic characterization of internal borescope indications in a turbine blade made of alloy 247 LC DS
- Picture of the Month
- Picture of the Month
- News
- News
- Meeting diary
- Meeting Diary
