各向异性对利用超声表面波测量 316L 不锈钢残余应力的影响

IF 0.9 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING
Zhaojie Chu, Chenggang Li, Jianjun Liu, Jianguo Zhang, Dabing Chen, Lun Wang
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引用次数: 0

摘要

摘要 铁铬合金在高温下具有良好的耐腐蚀性和抗氧化性,因此被广泛应用于电力、石油和制造业。超声波是迄今为止测量在役部件残余应力的唯一无损方法。然而,对于具有材料各向异性的部件,如通过轧制加工的材料,测量精度受到很大限制。本文使用轧制的 316L 不锈钢样品来研究纹理对超声表面波测量残余应力的影响。实验结果表明,表面波在试样中的传播速度具有各向异性。平行于轧制方向(0°)的波速最大,而垂直于轧制方向(90°)的波速最小,从而影响测量精度。研究发现,降低表面波的频率可以减少各向异性的影响。因此,采用低频法和修正公式来提高测量精度。滚动方向的最大误差从 21.3 兆帕减少到 3.6 兆帕,最大相对误差也从 45.4% 减少到 9.0%。修正公式可进一步减小各向异性的影响,最大误差值进一步减小到 2.3 MPa,最大相对误差减小到 4.9%,表面波检测精度得到有效提高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Effect of Anisotropy on Residual Stress Measurement of 316L Stainless Steel by Ultrasonic Surface Wave

Effect of Anisotropy on Residual Stress Measurement of 316L Stainless Steel by Ultrasonic Surface Wave

Fe–Cr alloys are widely used in power, petroleum, and manufacturing industries for their good resistance to corrosion and oxidation at high temperatures. Ultrasound is the only nondestructive method so far to measure the residual stress of in-service components. However, for parts with material anisotropy, such as materials processed by rolling, the measurement accuracy is highly restrained. In this paper, a rolled 316L stainless steel sample is used to study the influence of texture on the measurement of residual stress by ultrasonic surface wave. The experimental results show that the propagation velocity of surface waves in the sample has anisotropic characteristics. The wave velocity parallel to the rolling direction (0°) is the maximum, and the wave velocity perpendicular to the rolling direction (90°) is the minimum, thereby affecting the measurement accuracy. It is found that reducing the frequency of surface waves can reduce the influence of anisotropy. Therefore, a low-frequency method and modified formula are used to improve the measurement accuracy. The maximum error in the rolling direction is reduced from 21.3 to 3.6 MPa, and the maximum relative error is also reduced from 45.4 to 9.0%. The modified formula can further reduce the influence of anisotropy, with the maximum error value further reduced to 2.3 MPa, the maximum relative error reduced to 4.9%, and the surface wave detection accuracy effectively improved.

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来源期刊
Russian Journal of Nondestructive Testing
Russian Journal of Nondestructive Testing 工程技术-材料科学:表征与测试
CiteScore
1.60
自引率
44.40%
发文量
59
审稿时长
6-12 weeks
期刊介绍: Russian Journal of Nondestructive Testing, a translation of Defectoskopiya, is a publication of the Russian Academy of Sciences. This publication offers current Russian research on the theory and technology of nondestructive testing of materials and components. It describes laboratory and industrial investigations of devices and instrumentation and provides reviews of new equipment developed for series manufacture. Articles cover all physical methods of nondestructive testing, including magnetic and electrical; ultrasonic; X-ray and Y-ray; capillary; liquid (color luminescence), and radio (for materials of low conductivity).
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