Evaluating the grain size in curved components using the ultrasonic attenuation method with diffraction correction

Ultrasonic wave propagation in curved components was simulated based on the Multi-Gaussian beam theory to eliminate the negative influence of the surface curvature and water path on grain size attenuation evaluation. The multi-frequency weighted attenuation evaluation model with diffraction correcti...

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Bibliographic Details
Published in:NDT & E international : independent nondestructive testing and evaluation 2016-12, Vol.84, p.20-26
Main Authors: Zhang, Chenxin, Li, Xiongbing, Song, Yongfeng, Han, Xiaoqin, Han, Jun
Format: Article
Language:English
Subjects:
Attenuation
Curvature
Curved component
Diffraction
Diffraction correction
Errors
Grain size
Mathematical analysis
Multi-Gaussian
Nondestructive testing
Ultrasonic attenuation
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Summary:Ultrasonic wave propagation in curved components was simulated based on the Multi-Gaussian beam theory to eliminate the negative influence of the surface curvature and water path on grain size attenuation evaluation. The multi-frequency weighted attenuation evaluation model with diffraction correction was introduced into the measured attenuation spectrum to control the systematic error. The experimental results show that for 6 blocks with different curvatures and the same mean grain size, the relative error was reduced from 15.41% to 4.28% by using the presented method, and the standard deviation of the error was 15.92% of that of the traditional method.
ISSN:0963-8695
1879-1174
DOI:10.1016/j.ndteint.2016.07.004