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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 Relative Measurement of the Acoustic Nonlinearity Parameter using Laser Detection of an Ultrasonic Wave  fileimage   4519
International A Method to Estimate the Absolute Ultrasonic Nonlinearity Parameter from Relative Measurements  fileimage   4545
International Finite element analysis of a low-velocity impact test for glass fiber-reinforced polypropylene composites considering mixed-mode interlaminar fracture toughness  fileimage   4805
International Assessment of Thermal Degradation by Cumulative Variation of Ultrasonic Nonlinear Parameter     41740
International Assessment of Thermal Aging of Aluminum Alloys by Acoustic Nonlinearity Measurement of Surface Acoustic Waves     39064
International Absolute Measurement and Relative Measurement of Ultrasonic Nonlinear Parameter     39602
International Experimental Comparison of Nonlinear Parameters Obtained from Absolute Measurement and Relative Measurement     37920
International Comparison of Ultrasonic Nonlinear Parameters Measured by PZT and LiNbO3 Transducers     38887
International Nanotribological and wetting performance of hierarchical patterns     39762
International Demonstration of Disturbance Propagation and Amplification in Car-Following Situation for Enhancement of Vehicle Platoon System     41957
International Relative Measurement of Acoustic Nonlinear Parameters and Comparison of Sensitivity to Thermal Aging     41187
International Non-contact Measurement of Elastic Modulus by using Laser Ultrasonic     43682
International Relationship between Second- and Third-order Acoustic Nonlinear Parameters in Relative Measurement     40172
International Non-Contact Evaluation of Acoustic Nonlinearity of a Laser-Generated Surface Wave in a Plastically Deformed Aluminum Alloy  image   40355
International Influence of repetitive pulsed laser irradiation on the surface characteristics of an aluminum alloy in the melting regime     41280
International Real-time detection of surface cracks on silicon wafers during laser beam irradiation     40886
Domestic High power CW laser-induced damage of CMOS image sensor     41459
Domestic Measurement of Ultrasonic Nonlinear Parameter by Using Non-Contact Ultrasonic Receiver     42342
Domestic Study on the Nonlinear Electromagnetic Acoustic Resonance Method for the Evaluation of Hidden Damage in a Metallic Material     40786
International Influence of laser beam profiles on the frequency bandwidth of laser-generated surface acoustic waves     42449
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