Evaluation of Steam Turbine Blades Surface Cracks Detectability by Nondestructive Methods

被引：3
|
作者：
Vesela, J. [1 ]
Mares, P. [1 ]
Zahradka, P. [1 ]
Patera, J. [1 ]
机构：
[1] Res Ctr Rez, Diagnost & Qualificat Dept, Husinec Rez 25068, Czech Republic
来源：
JOURNAL OF NUCLEAR ENGINEERING AND RADIATION SCIENCE | 2021年 / 7卷 / 02期
关键词：
ultrasonics; radiography; magnetic methods; defects; corrosion;
D O I：
10.1115/1.4048479
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
This article describes methods suitable for crack detection on low pressure steam turbine blades, not including the blade root. These cracks, which are initiated in the corrosion pitting, can cause serious damage to the steam turbine blade leading to its breakaway. Therefore, the detection of these cracks on the early stages of blade fracture is very important. Several methods for detecting of surface cracks (ultrasonic Rayleigh waves, eddy current with flexible array probe, etc.) has been tested on artificial flaws, which were manufactured into turbine blades. The comparison of all these methods is described as well as the evaluation of their advantages and disadvantages. Simulations of ultrasonic testing are also presented in this article.
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页数：4
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