不锈钢管中缺陷和几何各向异性影响的研究:相控阵超声检测,sh波

IF 4.8 Q2 ENERGY & FUELS
Esmaeil Mirmahdi, Ramin Khamedi, Davood Afshari, Mehdi Khosravi
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引用次数: 0

摘要

目前,相控阵超声检测(PAUT)是无损检测(NDT)中检测缺陷的一种合适的方法。采用新方法对直径为500 mm、长度为1000 mm的不锈钢管进行了模拟,并对管的内外表面裂纹和内表面腐蚀缺陷进行了模拟。同时使用4个特性为2 MHz的探头,每个探头有64个元件。通过增加探头及其元件的数量,可以获得更准确的缺陷信息,从而更容易检测到缺陷的位置,减少了散射信号和噪声,甚至可以检测到小尺寸的缺陷。考虑到这一重要优势,本研究报告了一种新的使用方法,即在PAUT中增加探针数量来检测缺陷,特别是腐蚀缺陷。介绍了不锈钢管水平极化横波群速度和相位几何各向异性的研究结果。由于管道材料的各向同性,管道外表面在盖方向的速度比母线高40 m/s。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigating the Effects of Defects and the Effect of Geometric Anisotropy in Stainless Steel Pipes: Phased Array Ultrasonic Test, SH-wave

Today, Phased Array Ultrasonic Testing (PAUT) is a suitable method for detecting defects in Non-destructive Testing (NDT). This simulation was done with a new method on a stainless steel pipe with a diameter of 500 mm and a length of 1,000 mm, and cracks were modeled on the external and internal surfaces and corrosion defects on the internal surface. Four probes with a characteristic of 2 MHz were used simultaneously, each probe having 64 elements. By increasing the number of probes and their elements, more accurate information about the defects is obtained, which makes it easier to detect the location and leads to a reduction of scattered signals and noise, which can detect even small size defects. Considering this important advantage, a new use of the method of increasing the number of probes in PAUT is reported in this study to detect defects, especially corrosion defects. The results of geometric anisotropy studies of group velocity and phase of horizontally polarized shear waves (SH-waves) for stainless steel pipe were presented. Due to the isotropic properties of the pipe material, the speed on the outer surface of the pipe in the direction of the cover is 40 m/s higher than the generatrix.

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CiteScore
7.50
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