Turbine blade failure in a thermal power plant

被引：52

作者：

Das, G ^{[1
]}

Chowdhury, SG ^{[1
]}

Ray, AK ^{[1
]}

Das, SK ^{[1
]}

Bhattacharya, DK ^{[1
]}

机构：

[1] CSIR, Natl Met Lab, Mat Characterizat Div, Jamshedpur 831007, Bihar, India

来源：

ENGINEERING FAILURE ANALYSIS | 2003年 / 10卷 / 01期

关键词：

turbine blade; corrosion fatigue; failure analysis; fractography; intergranular fracture;

D O I：

10.1016/S1350-6307(02)00022-5

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The failure of a LP (low pressure) turbine blade of a 220 MW thermal power plant is presented. The blade was made of martensitic stainless steel and the structure was tempered martensite. There was no evidence of degradation of blade material. The fracture took place at the aerofoil region, 113-mm from the root. Throughout the blade surface Si rich phases were detected. Several pits/grooves were found on the edges of the blades and chloride was detected in these pits. These were responsible for the crevice type corrosion. The probable carriers of Cl- were Ca and K, which were found on the blade. The failure mode was intergranular type. Possibly the ultimate failure was due to corrosion-fatigue. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：85 / 91

页数：7

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Das, G ;

Chattoraj, I ;

Das, SK ;

Bhattacharya, DK .

ENGINEERING FAILURE ANALYSIS, 1998, 5 (03) :181-193

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