Metallurgical failure analysis of small-bore tube compression fitting that fractured in a gas turbine burner test rig
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B. 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.
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
After several combustion tests with natural gas-hydrogen mixtures, a fracture occurred inside the compression fitting during disassembly of a thin-walled ¼-inch tube due to high-cycle fatigue fracture. There was no evidence of hydrogen embrittlement or other damage mechanisms.
Kurzfassung
Nach mehreren Verbrennungstests mit Erdgas-Wasserstoff-Gemischen ist bei der Demontage einer dünnwandigen ¼ Zoll Rohrleitung diese innerhalb der Schneidringverschraubung infolge hochzyklischen Schwingbruchs gebrochen. Es wurden keine Anzeichen für Wasserstoffversprödung oder andere Schadensmechanismen gefunden.
About the authors
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.
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] Dawerdt, J.: Personal communication, March 11, 2022.Search in Google Scholar
[2] Wanjura, S.: Personal communication, March 14, 2022.Search in Google Scholar
[3] Neidel, A.; Fischer, B.; Giller, M.: Analyse Rohrbruch. Interner Bericht BLN MT/2022/0090. Berlin, 15.03.2022.Search in Google Scholar
[4] https://www.schwer.com/en_GB/rings/c/5a37cf1a1029f68df235bc77, accessed January 3, 2024.Search in Google Scholar
[5] ASM Handbook, Vol. 11: Failure Analysis and Prevention, Sixth printing, American Society for Metals, Handbook Committee, 1998.Search in Google Scholar
[6] Lange, G.: Systematische Beurteilung technischer Schadensfälle. 3. Auflage, DGM, 1992.Search in Google Scholar
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Articles in the same Issue
- Inhalt
- Editorial
- Editorial
- Effect of tramp elements on the microstructural evolution of a ferritic-pearlitic steel
- Deep learning in metallography: adapting a grain size determination model to develop the new comparison charts for ISO 643
- Design and development of welding electrode for structural steel
- Failure Analysis
- Metallurgical failure analysis of small-bore tube compression fitting that fractured in a gas turbine burner test rig
- Picture of the Month
- Picture of the Month
- News
- News
- Meeting Diary
- Meeting Diary
