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Austenitic Stainless Steel Bolt Failure by Stress Corrosion Cracking

  • A. Neidel , T. Gädicke , V. Hartanto , S. Wallich and E. Wöhl
Published/Copyright: February 2, 2018
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Practical Metallography
From the journal Practical Metallography Volume 55 Issue 2

Abstract

During a minor inspection of a heavy-duty gas turbine engine, the hexagonal head of a bolt used for fixing a metal plate in the air intake was found on the floor of the air intake casing [1, 2]. The respective washer was not found. It is believed to have been ingested into the engine, having caused moderate compressor damage. The inspection was started after 83.500 operating hours. Only one fractured bolt was found. The subject bolt fractured due to stress corrosion cracking (SCC), induced by pitting corrosion and possibly assisted by crevice corrosion.

Kurzfassung

Im Rahmen einer kleineren Inspektion an einer Großgasturbine wurde der Sechskantkopf einer zur Befestigung einer Metallplatte im Lufteinlass verwendeten Schraube auf dem Boden des Lufteinlassgehäuses gefunden [1, 2]. Die zugehörige Unterlegscheibe konnte nicht gefunden werden. Es wird angenommen, dass diese von der Turbine angesaugt wurde und am Verdichter moderate Schäden verursacht hat. Die Inspektion begann nach 83.500 Betriebsstunden. Lediglich eine einzige gebrochene Schraube wurde gefunden. Die entsprechende Schraube brach aufgrund einer durch Lochkorrosion hervorgerufenen Spannungsrisskorrosion (SpRK), möglicherweise unter Mitwirkung von Spaltkorrosion.

Übersetzung: E. Engert

References / Literatur

[1] Internal report PCM 3–16 – 001249Search in Google Scholar

[2] Internal report PCM 3–16 – 001282Search in Google Scholar

[3] Internal technical instruction DPTI-00013350Search in Google Scholar

[4] Wanjura, S.: Personal communication, February 3, 2016Search in Google Scholar

[5] Lange, G. (Hrsg.): Systematische Beurteilung technischer Schadensfälle. Wiley-VCH, 2001Search in Google Scholar

[6] ASM Handbook: Volume 11 Failure Analysis and Prevention. 6th edition, ASM International, 1998Search in Google Scholar

Published Online: 2018-02-02
Published in Print: 2018-02-15

© 2018, Carl Hanser Verlag, München

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Near-Net Shape Manufacturing of Copper-Ceramic Composites Via Gas Pressure Infiltration in Permanent Molds
  7. Examination of Different Slags as By-Products of Late Bronze Age Copper Metallurgy
  8. Austenitic Stainless Steel Bolt Failure by Stress Corrosion Cracking
  9. Meeting Diary/Veranstaltungskalender
  10. Meeting Diary
https://doi.org/10.3139/147.110493

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Editorial
  4. Editorial
  5. Technical Contributions/Fachbeiträge
  6. Near-Net Shape Manufacturing of Copper-Ceramic Composites Via Gas Pressure Infiltration in Permanent Molds
  7. Examination of Different Slags as By-Products of Late Bronze Age Copper Metallurgy
  8. Austenitic Stainless Steel Bolt Failure by Stress Corrosion Cracking
  9. Meeting Diary/Veranstaltungskalender
  10. Meeting Diary
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