Failure analysis of turbine blade in atomic power plant

被引：3
|
作者：
Lee, Dong Woo [1 ]
Cho, Seok Swoo [2 ]
Hong, Soon Hyeok [3 ]
Joo, Won Sik [1 ]
机构：
[1] Dong A Univ, Dept Mech Engn, Pusan 604714, South Korea
[2] Kangwon Natl Univ, Dept Vehicle Engn, Samcheok Si 245711, Gangwon Do, South Korea
[3] Pukyong Natl Univ, Cooperat Lab Ctr, Pusan 608739, South Korea
来源：
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY | 2008年 / 22卷 / 05期
关键词：
AFM; fractography; plastic zone depth; SEM; stress intensity factor;
D O I：
10.1007/s12206-008-0204-4
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The turbine blade in an atomic power plant may be fractured by fatigue, stress corrosion cracking and bad fitting. Especially, fatigue fracture is caused by low stress amplitude below the yielding stress. SEM fractography does not have striation, but AFM fractography does on the fatigue fractured surface of 12% Cr steel used for the turbine blade. Sur-face roughness R-q measured by AFM is linearly related to the stress intensity factor range, Delta K, and is increased linearly according to the load range Gamma P. Therefore, in this study, the loading condition applied to a turbine blade is predicted by the relation between the intersection of the Delta K-R-q relation and load range Delta P.
引用
收藏
页码：864 / 870
页数：7
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