Metallurgical Failure Investigation of Fractured Spring Seals
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A. Neidel
Erhan Cagliyan completed training as a state-certified technical assistant for metallography and physical materials analysis at the Lette-Verein in Berlin. For the last 6 years he has been working in the laboratory of the Siemens gas turbine plant in Berlin, where the main focus of his work is damage analysis, quantitative image analysis, microstructure characterization with the field emission scanning electron microscope and X-ray fluorescence analysis.
Boromir Fischer Completed an apprenticeship as a state-certified technical assistant for metallography and physical materials analysis at the Lette-Verein in Berlin. For more than 10 years, he has been a member of staff in the metallography laboratory of the Siemens gas turbine plant in Berlin, where the focus of his work is failure analysis and microstructure investigations using the field emission scanning electron microscope.
Abstract
Elastic sealing elements used in combustion chamber assemblies of heavy-duty gas turbine engines used for power generation fractured from high cycle fatigue failure. The subject assembly was burner rig tested in a special testing facility. It was speculated that the affected spring seals likely failed due to forced excitation during burner rig testing, since no material imperfections or fabrication flaws, such as spot weld imperfections, were detected that could have contributed to the failure.
Kurzfassung
Elastische Dichtelemente, die in Brennkammerbaugruppen von Großgasturbinen in der Stromerzeugung zum Einsatz kamen, brachen infolge hochzyklischer Ermüdung. Die betroffene Baugruppe wurde in einem Brennerversuchsstand einer speziellen Prüfeinrichtung getestet. Es wurde gemutmaßt, dass das Versagen der betroffenen Federdichtungen vermutlich auf eine während der Tests am Brennerversuchsstandtests auftretende erzwungene Erregung zurückzuführen ist, da weder Material- noch Fabrikationsfehler wie beispielsweise Punktschweißfehler gefunden wurden, die zum Versagen hätten beitragen können.
About the authors
Erhan Cagliyan completed training as a state-certified technical assistant for metallography and physical materials analysis at the Lette-Verein in Berlin. For the last 6 years he has been working in the laboratory of the Siemens gas turbine plant in Berlin, where the main focus of his work is damage analysis, quantitative image analysis, microstructure characterization with the field emission scanning electron microscope and X-ray fluorescence analysis.
Boromir Fischer Completed an apprenticeship as a state-certified technical assistant for metallography and physical materials analysis at the Lette-Verein in Berlin. For more than 10 years, he has been a member of staff in the metallography laboratory of the Siemens gas turbine plant in Berlin, where the focus of his work is failure analysis and microstructure investigations using the field emission scanning electron microscope.
References / Literatur
[1] Neidel, A.; Riesenbeck, S.; Fischer, B.: Failure of a Swivel Arm in a Turning Gear Assembly. Pract. Metallogr., to be published10.3139/147.110644Search in Google Scholar
[2] Neidel, A.; Cagliyan, E.; Fischer, B.: Internal Report BLN MT/2018/0222, Berlin, March 10, 2018Search in Google Scholar
[3] Internal Process Specification 82161GR, Rev. C, May 23, 2007Search in Google Scholar
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Articles in the same Issue
- Contents
- Editorial
- Image Processing using Open Source Tools and their Implementation in the Analysis of Complex Microstructures
- The Effect of Seven Etching Solutions used for the Differentiated Visualization of Complex Microstructures in Low-Alloyed Cast Iron
- Failure analysis
- Metallurgical Failure Investigation of Fractured Spring Seals
- Picture of the month
- Picture of the Month
- People
- Nachruf auf Inge Morlok, Metallographin mit Leib und Seele
- News
- Mit Nanopartikeln gegen gefährliche Bakterien
- Meeting Diary
- Meeting Diary
