Skip to Main Content

Abstract

A transition duct was part of a 100-MW power-generation gas turbine. The duct was fabricated from several panels of a modified nickel alloy, IN-617. After six years of operation, two such ducts failed during the next two years, causing outages. Failure was in the form of a total collapse of the duct. Carbides and carbonitrides were found in all of the transitions examined. Investigation supported the conclusion that failure was caused by oxidation, oxide penetration, and oxide spallation which caused thinning of the duct wall. It was felt that the high oxygen and nitrogen partial pressures of the gases within the duct, combined with the high temperatures, facilitated nitrogen pickup. No recommendations were made.

You do not currently have access to this chapter.
Don't already have an account? Register

2019. "High-Temperature Degradation of a Gas Turbine Transition Duct", ASM Failure Analysis Case Histories: Power Generating Equipment

Download citation file:


Close
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal