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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
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International Dependence of Nonlinear Ultrasonic Characteristic on Second-Phase Precipitation in Heat-Treated Al 6061-T6 alloy     6205
International Relative Measurement of the Acoustic Nonlinearity Parameter using Laser Detection of an Ultrasonic Wave  fileimage   15014
International A Method to Estimate the Absolute Ultrasonic Nonlinearity Parameter from Relative Measurements  fileimage   15634
International Finite element analysis of a low-velocity impact test for glass fiber-reinforced polypropylene composites considering mixed-mode interlaminar fracture toughness  fileimage   15689
International Assessment of Thermal Degradation by Cumulative Variation of Ultrasonic Nonlinear Parameter     55814
International Assessment of Thermal Aging of Aluminum Alloys by Acoustic Nonlinearity Measurement of Surface Acoustic Waves     52796
International Absolute Measurement and Relative Measurement of Ultrasonic Nonlinear Parameter     52696
International Experimental Comparison of Nonlinear Parameters Obtained from Absolute Measurement and Relative Measurement     51854
International Comparison of Ultrasonic Nonlinear Parameters Measured by PZT and LiNbO3 Transducers     52751
International Nanotribological and wetting performance of hierarchical patterns     52923
International Demonstration of Disturbance Propagation and Amplification in Car-Following Situation for Enhancement of Vehicle Platoon System     55708
International Relative Measurement of Acoustic Nonlinear Parameters and Comparison of Sensitivity to Thermal Aging     54635
International Non-contact Measurement of Elastic Modulus by using Laser Ultrasonic     57577
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International Influence of repetitive pulsed laser irradiation on the surface characteristics of an aluminum alloy in the melting regime     54762
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