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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 Ultrasonic Estimation of Clamping Force in High-Tension Bolts   109687
International Acoustic Nonlinearity of Narrowband Lager-generated Surface Waves in the Bending Fatigue of Al6061 alloy.   111030
International Nonlinear Ultrasonic Techniques for Nondestructive Assessment of Micro Damage in Material : Review   111513
International Initiation time of near-infrared laser-induced slip on the surface of silicon wafers  image 112396
International Harmonic generation of an obliquely incident ultrasonic wave in solid-solid contact interfaces   113343
International Nonlinear ultrasonic characterization of thermal degradation in ferritic 2.25Cr-1Mo steel   115217
International CREEP CHARACTERIZATION OF SUPERALLOY IN-738 USING ULTRASONICC NONLINEARITY MEASUREMENT   115708
International Nonliner Ultrasonic Characterization of fatigue damage in sus316L alloy   116393
International A Novel Method for Distance and Relative Velocity Measurement in Rear-End Collision Warning System   116515
International Frequency Response of Narrowband Surface Waves Generated by Laser Beams Spatially Modulated with a Line-arrayed Slit Mask   117247
International Relative Measurement of Acoustic Nonlinear Parameters and Comparison of Sensitivity to Thermal Aging   117542
International Automatic Inspection of Pipe using Non-contact Guided-wave Technique with Enhanced Mode-selectivity   118036
International Reliability Evaluation of Hinges Used in Electronic Communication Devices   118180
International "Study on the Development of Multi-Path Ultrasonic Gas Flow Meter"   119343
International " Bending Fatigue Evaluation of Al6061 Alloy by Laser-generated Surface Wave"   119858
International Imaging of contact acoustic nonlinearity using synthetic aperture technique   120898
International Acoustic Nonlinearity of a Laser-Generated Surface Wave in a Plastically Deformed Aluminum Alloy   121087
International Influence of laser beam profiles on the frequency bandwidth of laser-generated surface acoustic waves   121917
International Nanotribological and wetting performance of hierarchical patterns   123499
International Automatic Non-Contact Defect Inspection of Cylindrical Shell Using a Laser-Ultrasonic Technique   123564
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