Ultrasonics methodology for defect and stress detection of in-serviced T-shaped R-zone components

Wang, Bingquan; Shi, Weijia; Zhao, Bo; Tan, Jiubin

doi:10.1016/j.ultras.2022.106730

Cited by 4 publications

(2 citation statements)

References 18 publications

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“…Eivani et al 20 Residual stress field during FSW of AZ91 Mg alloy AZ91 Mg alloy Wang et al 21 Defect and stress detection of in-serviced T-shaped R-zone components - Table 2. Utilization of the finite element approach for simulating the welding of various materials.…”

Section: Tc4 Alloymentioning

confidence: 99%

Ultrasonic and FEM residual stress measurement in dissimilar St37–St52 welding

Safikhanlu

Salehi

Najafabadi

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Numerous industries, like the military, the oil and gas industry, etc., rely heavily on dissimilar welding. The welding process leaves the structure with a variety of defects, such as residual stress, that degrade its performance and static and fatigue properties. Consequently, weld residual stress must be accurately measured. In this study, ultrasonic and finite element techniques are developed to assess the residual stress in dissimilar St37/St52 welding. In addition, hole-drilling technique is employed to confirm FEM and ultrasonic data. Probe fixture is designed and built for ultrasonic stress measurement, and the acoustoelastic coefficient is measured in St37 and St52. In welding finite element analysis, the Goldak model is used as the heat source, the Brekstad model is employed as the heat loss, and the Dflux subroutine is developed to apply the heat source to the weld line using the sedimentary method. The FEM and ultrasonic data are in good correlation with the hole drilling results (maximum error of 9%). The findings indicate that there is a high degree of concordance between the data gathered by FEM and ultrasonic technique (with error less than 1.75% at the weld zone).

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Section: Tc4 Alloymentioning

confidence: 99%

Ultrasonic and FEM residual stress measurement in dissimilar St37–St52 welding

Safikhanlu

Salehi

Najafabadi

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…This method greatly reduces the computation time. Wang et al [11] proposed the overall process of ultrasonics methodology of T-shaped R-zone components. A linear phased array probe was used to predict the location and size of cracks in T-type R-zone components.…”

Section: Introductionmentioning

confidence: 99%

High Temperature Mechanical Constants of TC4 alloy Detected by Laser Ultrasonic

Chen

Zhang

et al. 2023

Preprint

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Mechanical constants are the fundamental parameters for characterizing the mechanical properties of materials. Laser ultrasonic is a new non-destructive testing method characterized by long-range and non-contact. It is particularly suitable for detecting the mechanical properties of materials in harsh environments. TC4 alloy is one of the most important alloys for the production of engine blades, which is working at a high temperature of about 300–500℃. In this paper, the mechanical constants (elastic modulus and Poisson's ratio) of TC4 alloy at high temperatures are studied based on the finite element method. The mechanical constants are determined by their relation to the velocity of the ultrasonic wave. The finite element model of the laser-induced multi-mode wave at room temperature is established. Compare with the experimental results, the Rayleigh wave velocity error is 1.70%, and the longitudinal wave velocity error is 1.18%. The numerical results agree well with the experimental results, which confirms the correctness of the model. On this basis, further inversion of elastic modulus and Poisson's ratio of TC4 alloy at high temperature. It is found that elastic modulus and Poisson's ratio of TC4 alloy have a quadratic relationship with temperature. The mechanical constants at high temperatures are predicted, and the relative error is less than 4%. In this paper, the numerical results are in good agreement with the theoretical values, which verifies the validity and reliability of the model. It provides a reference for the further use of laser ultrasonic to determine the mechanical properties of materials at high temperatures.

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