Development of Automatic Ultrasonic System for NDE Characterization on the Heat Treatment in Piston Rods for a Use of Shock Absorbers

Im, Kiegon; Lee, H.H.; Kim, Sunkyu; Jeong, Jong-an; Cho, Youngtae; Deuk, Woo Yong; Zhang, G.L.; 곽영환,; 양인영,

doi:10.7735/ksmte.2019.28.4.238

Cited by 2 publications

(3 citation statements)

References 3 publications

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“…Rayleigh waves are generated when ultrasonic waves reach the Rayleigh angle (the incident angle at which incident ultrasonic waves propagate by converting all of the ultrasonic energy into surface waves along the surface) at the liquid-solid interface as shown in Figure 1, and their energy is concentrated and propagated on a solid surface [1,5]. This study used Rayleigh waves with a high resolution to analyze the types of surface defects on piston rods.…”

Section: Principle Of Ultrasonic Waves and Fem Simulation 21 Measurem...mentioning

confidence: 99%

“…Therefore, the Rayleigh angle was set to 29.1 • , which had the largest peak-to-peak amplitude. Although the Rayleigh angle is generally determined using Snell's law, the peak-topeak amplitude of the ultrasonic waves received at the optimal incident angle (29.1°) was measured first since each material has different properties, [1,13]. Secondly, the peak-topeak amplitude at a random small angle θ1 was measured.…”

Section: Optimization Measurement Technique Of Rayleigh Anglesmentioning

confidence: 99%

“…Various processes are performed on the surfaces of piston rods during the manufacturing process. Currently, sampling and visual inspections are used to test integrity [1,2].…”

Section: Introductionmentioning

confidence: 99%

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NDE Characterization of Surface Defects on Piston Rods in Shock Absorbers Using Rayleigh Waves

Yeom

Lee³

et al. 2022

Applied Sciences

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In general, shock absorbers are components that can absorb shock and vibration energy caused by wheel behavior, and they provide handling stability. As a piston rod is an important component in shock absorbers, multiple processes are performed in order to guarantee its quality during manufacturing. Micro-defects can be generated on the surfaces of piston rods after processing. Because these defects can degrade the function of shock absorbers, proper non-destructive techniques are necessary to monitor the surfaces of piston rods. In this study, micro-defects were artificially machined on the surfaces of piston rods. In particular, a Rayleigh wave technique was adopted to detect defects on the surfaces of the piston rods, and Rayleigh wave behaviors were analyzed to establish beam profiles. In terms of the experimental method, defects were fabricated on the piston rods, and the optimal Rayleigh angle was determined using the pulse-echo method with ultrasonic transducers in a water tank. This was performed to evaluate the characteristics of the Rayleigh waves. In testing, regardless of the types of micro-defects on the surfaces of the pistons, it was found that the optimal inspection condition could be in the range of 5–10 mm, where ultrasonic signals were received with a high resolution. Moreover, the behaviors of the transmitted Rayleigh waves were simulated, and reflection, transmission, and scattering occurred due to defects at the interface between the water and steel. Thus, the propagation of Rayleigh waves and the optimal test conditions were implemented through FEM simulation to generate effective Rayleigh waves.

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Section: Principle Of Ultrasonic Waves and Fem Simulation 21 Measurem...mentioning

confidence: 99%

Section: Optimization Measurement Technique Of Rayleigh Anglesmentioning

confidence: 99%

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NDE Characterization of Surface Defects on Piston Rods in Shock Absorbers Using Rayleigh Waves

Yeom

Lee³

et al. 2022

Applied Sciences

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NDE Characterization on the Heat Treatment in Piston Rods for a Use of Shock Absorbers Using a Simple Automatic Ultrasonic System

Im¹,

Lee²,

Kim³

et al. 2020

ksmte

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Development of Automatic Ultrasonic System for NDE Characterization on the Heat Treatment in Piston Rods for a Use of Shock Absorbers

Cited by 2 publications

References 3 publications

NDE Characterization of Surface Defects on Piston Rods in Shock Absorbers Using Rayleigh Waves

NDE Characterization of Surface Defects on Piston Rods in Shock Absorbers Using Rayleigh Waves

NDE Characterization on the Heat Treatment in Piston Rods for a Use of Shock Absorbers Using a Simple Automatic Ultrasonic System

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