Evaluating the grain size in curved components using the ultrasonic attenuation method with diffraction correction. (December 2016)

• Record Type: Journal Article
• Authors: Zhang, Chenxin; Li, Xiongbing; Song, Yongfeng; Han, Xiaoqin; Han, Jun
• Is Part Of: NDT & E international. Volume 84(2016)
• Page Start: 20
• Page End: 26
• Publication Date: 2016-12
• Subjects: Grain size -- Ultrasonic attenuation -- Curved component -- Multi-Gaussian -- Diffraction correction; Nondestructive testing -- Periodicals; Contrôle non destructif -- Périodiques; Electronic journals; 620.1127
• DOI: 10.1016/j.ndteint.2016.07.004
• Languages: English
• ISSNs: 0963-8695

Abstract

Abstract: 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.