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Fretting Fatigue Cracking of a Center Guide Bolt Supporting the Combustion Chamber in a Heavy-duty Gas Turbine Engine

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Published/Copyright: March 6, 2018
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Practical Metallography
From the journal Practical Metallography Volume 55 Issue 3

Abstract

The slotted center guide bolt of the center guide feature of the lower part of the outer shell of an annular combustion chamber was found fractured in a heavy-duty gas turbine engine used for power generation, after approximately 5.500 operating hours. The incident was a one-off event and not a recurring incident. No similar events were reported from the fleet; hence the failure was not considered a field issue. The metallurgical root cause investigation that was ordered to determine the failure mechanism revealed that the incident center guide bolt failed by fretting fatigue cracking, a high cycle fatigue (HCF) phenomenon.

Kurzfassung

In einer Großgasturbine, die der Stromerzeugung dient, wies der geschlitzte Führungsbolzen der Führungseinrichtung im Unterteil der Außenschale einer Ringbrennkammer nach ca. 5.500 Betriebsstunden einen Bruch auf. Bei dem Vorkommnis handelte es sich um einen Einzelfall und nicht um ein sich wiederholendes Phänomen. Ähnliche Vorkommnisse innerhalb der Anlagenflotte wurden nicht berichtet; das Versagen wurde also nicht als ein systematischer maschinenseitiger Fehler angesehen. Die metallurgische Ursachenanalyse, die zur Bestimmung des Versagensmechanismus in Auftrag gegeben wurde, zeigte, dass der betreffende Führungsbolzen aufgrund eines durch Reiboxidation induzierten Schwingbruches versagte, einem Phänomen der hochzyklischen Ermüdung (HCF).

Übersetzung: V. Müller

References / Literatur

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Published Online: 2018-03-06
Published in Print: 2018-03-15

© 2018, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Heat Treatment and Microstructural Contrasting on Low-Alloy Copper-Based Alloys
  7. Analysis, Modeling and Simulation of Tomographic Image Data for the 3D Microstructure of Electrode Material in Lithium-Ion Batteries
  8. Detailed Metallographic Analysis of the Surface Layer Structure of Carbonitrided Case-Hardening Steels after Varied Tempering Treatments
  9. Fretting Fatigue Cracking of a Center Guide Bolt Supporting the Combustion Chamber in a Heavy-duty Gas Turbine Engine
  10. Meeting Diary/Veranstaltungskalender
  11. Meeting Diary
https://doi.org/10.3139/147.110498

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Heat Treatment and Microstructural Contrasting on Low-Alloy Copper-Based Alloys
  7. Analysis, Modeling and Simulation of Tomographic Image Data for the 3D Microstructure of Electrode Material in Lithium-Ion Batteries
  8. Detailed Metallographic Analysis of the Surface Layer Structure of Carbonitrided Case-Hardening Steels after Varied Tempering Treatments
  9. Fretting Fatigue Cracking of a Center Guide Bolt Supporting the Combustion Chamber in a Heavy-duty Gas Turbine Engine
  10. Meeting Diary/Veranstaltungskalender
  11. Meeting Diary
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