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Failure Analysis of a Gas Turbine Marriage Bolt

  • Mohsen Mohammadi
  • Hamid Reza Salimi
Feature

Introduction

A gas turbine exploded after 3 h of ordinary operation. This type of gas turbine works at maximum 5,100 rpm angular velocity and 18 MW output power. The rotor of the turbine had undergone repair after 77,000 operating hours and was then assembled on another unit of the power plant. Total operating hours and number of starts were 95,000 h and 4,785 times, respectively. The operating hours are listed in Table  1.
Table 1

Operating Hours of the Gas Turbine

Item

Data

Total operating hours

95,000 hours

Total number of starts

4,785 times

Operating hours prior to repair

77,000 hours

Operating hours after repair

18,000 hours

Keywords

Coating Layer Journal Shaft Inlet Plenum Scan Electron Microscope Inspection Exhaust Diffuser 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The authors are thankful to the executive manager of Ray power plant, Mr. Mohajerani, for his assistance in carrying out the research and permission to publish the article.

References

  1. 1.
    ASTM E8M-90a. standard test method for tension testing of metallic materials [metric], Vol.03.01 ASTM, 2001.Google Scholar
  2. 2.
    ASM handbook. Failure analysis and prevention, Vol. 11. 9th ed. (American Society for Metals, Metals Park (OH), 1986).Google Scholar
  3. 3.
    G.H. Majzoobi, G.H. Farrahi, S.J. Hardy, M.K. Pipelzadeh, N. Habibi, Experimental Results and Finite Element Predictions of the Effect of Nut Geometry, Washer and Teflon Tape on the Fatigue Life of Bolts. Fatigue and Fracture of Engineering materials & Structures 28, 557–564 (2005).CrossRefGoogle Scholar

Copyright information

© ASM International 2007

Authors and Affiliations

  1. 1.Mechanical and Materials EngineeringThe University of Western OntarioLondonCanada
  2. 2.Mechanical EngineeringSharif University of TechnologyTehranIran

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