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http://www.tandfonline.com/doi/abs/10.1080/09349847.2014.934496

 

Research in Nondestructive Evaluation

Volume 26, Issue 1, 2015

Noncontact Evaluation of Acoustic Nonlinearity of a Laser-Generated Surface Wave in a Plastically Deformed Aluminum Alloy
Original Articles

Noncontact Evaluation of Acoustic Nonlinearity of a Laser-Generated Surface Wave in a Plastically Deformed Aluminum Alloy

DOI:
10.1080/09349847.2014.934496
Sungho Choia, Hogeon Seoa & Kyung-Young Jhangb*

pages 13-22

Abstract

A noncontact method to evaluate the acoustic nonlinearity of surface waves in a plastically deformed aluminum alloy is proposed. Line-arrayed laser beams modulated with slit masks were used for the generation of narrowband surface waves. A laser-ultrasonic detector using a two-wave mixing (TWM) approach was also employed to detect the surface waves. The specimens were deformed by a stroke-controlled tensile tester so as to generate various degrees of tensile deformation. The experimental results showed that the acoustic nonlinearity of the laser-generated surface waves increased according to the level of tensile deformation. This tendency was in good agreement with our previous results obtained using a contact piezoelectric (PZT)-transducer as the receiver. These results imply that our noncontact technique is suitable for the evaluation of acoustic nonlinearity and can be applied to practical damage assessment.


분류 제목 조회 수
International Thermal damages on the surface of a silicon wafer induced by a near-infrared laser   637052
International Analysis of the influence of surface roughness on measurement of ultrasonic nonlinearity parameter using contact-type transducer   503785
International Absolute Measurement and Relative Measurement of Ultrasonic Nonlinear Parameter   302770
International Influence of repetitive pulsed laser irradiation on the surface characteristics of an aluminum alloy in the melting regime   279971
International Real-time detection of surface cracks on silicon wafers during laser beam irradiation   249349
International Non-contact Measurement of Elastic Modulus by using Laser Ultrasonic   231811
Domestic Feasibility of MFC (Macro-Fiber Composite) Transducers for Guided Wave Technique   222076
International Assessment of Thermal Degradation by Cumulative Variation of Ultrasonic Nonlinear Parameter   207523
International Evaluation of Ultrasonic Nonlinear Characteristics in Heat-Treated Aluminum Alloy (Al-Mg-Si-Cu)   191729
Domestic Imaging of Harmonic Wave Generated by Contact Acoustic Nonlinearity in Obliquely Incident Ultrasonic Wave   191137
International Surface characteristics of aluminum 6061-T6 subjected to Nd:YAG pulsed-laser irradiation   187317
International Non-contact Single-Mode Guided Wave Technique by the Combination of Wavelength-Matched Laser Generation and Angle-Matched Leak Wave Detection   183031
International Experimental Comparison of Nonlinear Parameters Obtained from Absolute Measurement and Relative Measurement   167856
International Finite Difference Method Analysis of Ultrasonic Nonlinearity in Partially Degraded Material   160088
International Non-Contact Evaluation of Acoustic Nonlinearity of a Laser-Generated Surface Wave in a Plastically Deformed Aluminum Alloy  image 159949
International Fatigue-induced microdamage characterization of stainless steel 316L using innovative nonlinear acoustics   148121
International Demonstration of Disturbance Propagation and Amplification in Car-Following Situation for Enhancement of Vehicle Platoon System   147464
International Single-mode guided wave technique using ring-arrayed laser beam for thin-tube inspection   144282
Domestic 모드선택성을 강화한 비접촉식 유도초음파 기술   143238
International Comparison of Ultrasonic Nonlinear Parameters Measured by PZT and LiNbO3 Transducers   140135
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