Failure of gas turbine blades

被引：50
作者：
Gallardo, JM [1 ]
Rodríguez, JA [1 ]
Herrera, EJ [1 ]
机构：
[1] Univ Sevilla, Grp Met & Ingn Mat, ES Ingn, Seville 41092, Spain
来源：
WEAR | 2002年 / 252卷 / 3-4期
关键词：
gas-turbine failure; wear; thermal expansion; coating failure;
D O I：
10.1016/S0043-1648(01)00885-7
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The first-stage blades of a gas turbine had suffered a severe deterioration after around 10 500 h service. The expected service life was 40 000 h. Failure analysis (visual observations, studies by optical microscopy, scanning electron microscopy (SEM), SEM back-scattered electron (SEM-BSE), EDX, X-ray diffraction (XRD) and dimensional metrology) has been carried out. Blades, manufactured in the nickel superalloy CMSX-4, lost the protective coatings from their tips due to wear. Unprotected surfaces suffered high-temperature hot corrosion (Type-I corrosion). It is concluded that failure was mainly caused by an uneven clearance (out-of-line) between rotor and lining. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：264 / 268
页数：5
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