Degradation Evaluation of the Gas Turbine Hot-Gas-Path Component

Degradation of the gas turbine hot-gas-path components, the 1st stage blades and vanes, serviced for a period was evaluated by measuring the mechanical properties. For this, tensile and impact tests on these gas turbine parts were performed. Microstructure of the substrate and coating layers were al...

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Bibliographic Details
Published in:Key engineering materials 2005-11, Vol.297-300, p.2266-2271
Main Authors: Chang, S.Y., Song, Gee Wook, Kim, M.T., Jung, Jine Sung, Yoo, Keun Bong, Kang, Min Sung
Format: Article
Language:English
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Summary:Degradation of the gas turbine hot-gas-path components, the 1st stage blades and vanes, serviced for a period was evaluated by measuring the mechanical properties. For this, tensile and impact tests on these gas turbine parts were performed. Microstructure of the substrate and coating layers were also observed. The mechanical properties of the serviced blades were degraded by about 30% comparing with those of unused ones. In terms of the microstructure, the dissolution of the secondary g’ phase and subsequent coarsening of precipitates were observed in the substrate. And the interdiffusion zone near the coating layer was disappeared.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.297-300.2266