Failure analysis of gas turbine buckets

被引：48

作者：

Chang, JC

Yun, YH

Choi, C

Kim, JC

机构：

[1] KEPRI, Power Generat Lab, Taejon 305380, South Korea

[2] Hanyang Univ, Dept Ceram Engn, Seoul 133791, South Korea

来源：

ENGINEERING FAILURE ANALYSIS | 2003年 / 10卷 / 05期

关键词：

turbine blade failures; coating failures; thermal fatigue; stress analysis; thermal stability;

D O I：

10.1016/S1350-6307(03)00037-2

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The failure of a gas turbine first stage bucket was investigated by visual inspection and finite element analysis. The failure of a major bucket cooling passage was a critical cause of the separation of a bucket segment and caused microstructural deterioration of the neighboring regions by serious thermal load. Changes of microstructural morphologies of the damaged buckets under the thermal and mechanical stress were observed. After coating stripping, the bucket surface condition was evaluated through visual inspection and finite element analysis. The TMF (thermal-mechanical fatigue) cracking of surface coatings on the suction and pressure sides of the bucket was described. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：559 / 567

页数：9

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