Numerical simulation of laser ultrasonic detection of the surface microdefects on laser powder bed fusion additive manufactured 316L stainless steel

IF 3.2 3区工程技术 Q2 MECHANICS Theoretical and Applied Mechanics Letters Pub Date : 2022-11-01 DOI:10.1016/j.taml.2022.100398

Yang Liu , Zhixin Peng , Sheng Liu , Ping Hu

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引用次数: 2

Abstract

A numerical model is presented in this article to investigate the interactions between laser generated ultrasonic and the microdefects (0.01 to 0.1 mm), which are on the surface of the laser powder bed fusion additive manufactured 316L stainless steel. Firstly, the influence of the transient sound field and detection positions on Rayleigh wave signals are investigated. The interactions between the varied microdefects and the laser ultrasonic are studied. It is shown that arrival time of reflected Rayleigh (RR) waves wave is only related to the location of defects. The depth can be checked from the feature point Q, the displacement amplitude and time delay of converted transverse (RS) wave, while the width information can be evaluated from the RS wave time delay. With the aid of fitting curves, it is found to be linearly related. This simulation study provides a theoretical basis for quantitative detection of surface microdefects of additive manufactured 316L stainless steel components.

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激光超声检测316L不锈钢表面微缺陷的数值模拟

本文建立了激光超声与316L不锈钢粉末床熔合添加剂表面微缺陷(0.01 ~ 0.1 mm)相互作用的数值模型。首先，研究了瞬态声场和探测位置对瑞利波信号的影响。研究了不同微缺陷与激光超声的相互作用。结果表明，反射瑞利波的到达时间只与缺陷的位置有关。从特征点Q、转换横波的位移幅值和时间延迟可以检测深度，从转换横波的时间延迟可以评估宽度信息。借助拟合曲线，发现两者是线性相关的。该仿真研究为增材制造316L不锈钢构件表面微缺陷的定量检测提供了理论依据。

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来源期刊

Theoretical and Applied Mechanics Letters MECHANICS-

CiteScore

6.20

自引率

2.90%

发文量

545

审稿时长

12 weeks

期刊介绍： An international journal devoted to rapid communications on novel and original research in the field of mechanics. TAML aims at publishing novel, cutting edge researches in theoretical, computational, and experimental mechanics. The journal provides fast publication of letter-sized articles and invited reviews within 3 months. We emphasize highlighting advances in science, engineering, and technology with originality and rapidity. Contributions include, but are not limited to, a variety of topics such as: • Aerospace and Aeronautical Engineering • Coastal and Ocean Engineering • Environment and Energy Engineering • Material and Structure Engineering • Biomedical Engineering • Mechanical and Transportation Engineering • Civil and Hydraulic Engineering Theoretical and Applied Mechanics Letters (TAML) was launched in 2011 and sponsored by Institute of Mechanics, Chinese Academy of Sciences (IMCAS) and The Chinese Society of Theoretical and Applied Mechanics (CSTAM). It is the official publication the Beijing International Center for Theoretical and Applied Mechanics (BICTAM).