Root Cause Analysis of Steam Turbine Blade Failure

2015 ◽  
Vol 69 (2) ◽  
pp. 659-663 ◽  
Author(s):  
M. C. Antony Harison ◽  
M. Swamy ◽  
A. H. V. Pavan ◽  
G. Jayaraman
Keyword(s):  
Steam Turbine ◽  
Turbine Blade ◽  
Root Cause Analysis ◽  
Cause Analysis ◽  
Root Cause ◽  
Steam Turbine Blade ◽  
Blade Failure ◽  
Turbine Blade Failure

Steam turbine blade failure analysis

2008 ◽  
Vol 15 (1-2) ◽  
pp. 129-141 ◽  
Author(s):  
Zdzislaw Mazur ◽  
Rafael Garcia-Illescas ◽  
Jorge Aguirre-Romano ◽  
Norberto Perez-Rodriguez
Keyword(s):  
Failure Analysis ◽  
Steam Turbine ◽  
Turbine Blade ◽  
Steam Turbine Blade ◽  
Blade Failure ◽  
Turbine Blade Failure

Assessment of steam turbine blade failure and damage mechanisms using a Bayesian network

2021 ◽  
Vol 207 ◽  
pp. 107329
Author(s):  
David A. Quintanar-Gago ◽  
Pamela F. Nelson ◽  
Ángeles Díaz-Sánchez ◽  
Michael S. Boldrick
Keyword(s):  
Bayesian Network ◽  
Steam Turbine ◽  
Turbine Blade ◽  
Damage Mechanisms ◽  
Steam Turbine Blade ◽  
Blade Failure ◽  
Turbine Blade Failure

Investigation of HP Turbine Blade Failure in a Military Turbofan Engine

2017 ◽  
Vol 34 (1) ◽  
Author(s):  
R. K. Mishra ◽  
Johny Thomas ◽  
K. Srinivasan ◽  
Vaishakhi Nandi ◽  
R. Raghavendra Bhatt
Keyword(s):  
Turbine Blade ◽  
Substrate Material ◽  
Intergranular Cracking ◽  
Trailing Edge ◽  
Turbofan Engine ◽  
Root Cause ◽  
Final Failure ◽  
Cause Of Failure ◽  
Blade Failure ◽  
Turbine Blade Failure

AbstractFailure of a high pressure (HP) turbine blade in a military turbofan engine is investigated to determine the root cause of failure. Forensic and metallurgical investigations are carried out on the affected blades. The loss of coating and the presence of heavily oxidized intergranular fracture features including substrate material aging and airfoil curling in the trailing edge of a representative blade indicate that the coating is not providing adequate oxidation protection and the blade material substrate is not suitable for the application at hand. Coating spallation followed by substrate oxidation and aging leading to intergranular cracking and localized trailing edge curling is the root cause of the blade failure. The remaining portion of the blade fracture surface showed ductile overload features in the final failure. The damage observed in downstream components is due to secondary effects.

Root Cause Analysis of a Gas Turbine Compressor Stator Blade Failure

2005 ◽  
Author(s):  
Filippo Gavelli ◽  
Jude Foulds ◽  
Robert Sire ◽  
Harri Kytomaa
Keyword(s):  
Root Cause Analysis ◽  
Blade Vibration ◽  
Resonant Frequencies ◽  
Cause Analysis ◽  
Root Cause ◽  
Acoustical Analysis ◽  
Modes Of Vibration ◽  
Stator Blade ◽  
Blade Failure ◽  
Gas Turbine Compressor

Three identical 85 MW combustion turbines experienced cracking and failure of several first stage compressor stator (S1) blades. The root cause analysis involved the following distinct stages: 1. Examination of failed blades including fractography and analyses of the mechanics of their fracture; 2. Blade vibration analysis to determine the modes of vibration and corresponding resonant frequencies; 3. Inlet plenum flow and acoustical analysis to identify possible sources of excitation. This paper summarizes the methodology and results of the root cause analysis investigation and outlines the convergence of results obtained from the independently conducted mechanical and acoustical analyses.

Root Cause analysis of SG tube ODSCC indications within the tube sheets of NPP biblis unit A

2011 ◽  
pp. 78-86
Author(s):  
R. Kilian ◽  
J. Beck ◽  
H. Lang ◽  
V. Schneider ◽  
T. Schönherr ◽  
...  
Keyword(s):  
Root Cause Analysis ◽  
Cause Analysis ◽  
Root Cause

Rule Construction and its Execution for Root Cause Analysis

2012 ◽  
Vol 132 (10) ◽  
pp. 1689-1697
Author(s):  
Yutaka Kudo ◽  
Tomohiro Morimura ◽  
Kiminori Sugauchi ◽  
Tetsuya Masuishi ◽  
Norihisa Komoda
Keyword(s):  
Root Cause Analysis ◽  
Cause Analysis ◽  
Root Cause
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