In:
ECS Transactions, The Electrochemical Society, Vol. 11, No. 27 ( 2008-05-16), p. 55-76
Abstract:
Cracked and uncracked second row blades of 50 MW class combustion turbines have been studied to identify the cause of failure. Results show that the failures have been caused by environmentally-assisted creep in a manner similar to stress corrosion. A window of grain boundary spikes, indicative of the corresponding stress variation was observed locally at the failure site. A superimposition of the ranges of stress and those of corrosion seems to create the conditions under which creep and grain boundary corrosion can occur concurrently in a synergistic manner. Results show that operation at different rating, the types of corrosion found in the blades remain unchanged, but the magnitude and the location at which the different corrosion features are observed are changed systematically.
Type of Medium:
Online Resource
ISSN:
1938-5862
,
1938-6737
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2008
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