EMAT transducers and thickness characterization on aged boiler tubes

被引：14

作者：

Gori, M ^{[1
]}

Giamboni, S ^{[1
]}

DAlessio, E ^{[1
]}

Ghia, S ^{[1
]}

Cernuschi, F ^{[1
]}

机构：

[1] ENEL SPA,DSR,CRAM,MILAN,ITALY

来源：

ULTRASONICS | 1996年 / 34卷 / 2-5期

关键词：

EMATs; thickness characterization; aged boiler tubes;

D O I：

10.1016/0041-624X(95)00093-I

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

EMATs (Electro-Magnetic Acoustic Transducers) are non-contact devices to generate/detect ultrasonic waves via magnetostriction effects and/or Lorentz forces in several materials such as steel (ferromagnetic) and aluminium. The advantages of using EMATs are highlighted for the nondestructive characterization of material thickness on aged boiler tubes, in which oxides of variable thicknesses are produced on both walls. While a knowledge of steel thickness is essential to prevent tube failure, the ability to characterize both inner/outer oxide thicknesses will be a valuable aid to a better assessment of tube working conditions. This method, developed in the lab, has been validated by field measurements. Interpretation of the mechanisms allowing such advanced characterization is also provided.

引用

页码：339 / 342

页数：4