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http://www.tandfonline.com/toc/urnd20/28/1


Assessment of Thermal Aging of Aluminum Alloy by Acoustic Nonlinearity Measurement of Surface Acoustic Waves,

has now been assigned to an issue of Research in Nondestructive Evaluation, Issue 1


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http://www.tandfonline.com/doi/full/10.1080/09349847.2016.1261213


Assessment of Thermal Aging of Aluminum Alloy by Acoustic Nonlinearity Measurement of Surface Acoustic Waves

Pages 1-15 | Accepted author version posted online: 20 Dec 2016, Published online: 20 Dec 2016

Acoustic nonlinearity measurements via contact and noncontact generations of surface acoustic waves (SAWs) were performed in order to characterize the thermal aging of aluminum alloy. The experiments were conducted on aluminum alloy samples (Al6061-T6) that were heat-treated at 220°C for different times (0 min, 20 min, 40 min, 1 h, 2 h, 10 h, 100 h, 1,000 h) and thus had the different levels of thermal aging. The acoustic nonlinearity of the specimens in two types of SAWs was observed according to the thermal aging. The fractional changes in the acoustic nonlinearity exhibited similar trends in both contact and noncontact SAWs, showing that the acoustic nonlinearity measurement via SAWs is independent of the SAW-excitation method. Furthermore, the fractional changes agreed well with the variation in the yield strength, which was a minimum when the acoustic nonlinearity reached its first peak. Then, the acoustic nonlinearity drastically dropped while the yield strength increased to its highest value. Thus, the variation in the acoustic nonlinearity can be perceived as an indicator of the aging level. These results demonstrate the potential feasibility of acoustic nonlinearity measurements via SAWs for the nondestructive evaluation of material degradations.


  • Full-range stress–strain curve estimation of aluminum alloys using machine learning-aided ultrasound

  • Nondestructive Inspection of Directed Energy Deposited Components Using Scanning Acoustic Microscopy with Metalworking Fluids

  • Nondestructive Inspection of Cylindrical Components Repaired Via Directed Energy Deposition Using Scanning Acoustic Microscopy with Metal Lubricants

  • Plastic properties estimation of aluminum alloys using machine learning of ultrasonic and eddy current data

  • Calibration method using a narrowband signal for measurement of the acoustic nonlinearity parameter

  • Comparisons of second- and third-order ultrasonic nonlinearity parameters measured using through-transmission and pulse-echo methods

  • In-situ and Layer-by-layer Grain Size Estimation of Additively Manufactured Metal Components using Femtosecond Laser Ultrasonic Technique (Submitted)

  • Microstructural Characterization of Additively Manufactured Metal Components Using Linear and Nonlinear Ultrasonic Techniques

  • Tensile properties evaluation of additively manufactured Ti-6Al-4V/yttria-stabilized zirconia composite using absolute nonlinear-ultrasonic technique (Submitted)

  • Generation and Measurement of Gigahertz Ultrasonic Waves in Additively Manufactured Thin Metal Components using Femtosecond Laser and Application to In-situ Grain size Monitoring (Submitted)

  • Nondestructive evaluation of micro-oxide inclusions in additively manufactured metal parts using nonlinear ultrasonic technique

  • Mechanical properties estimation of additively manufactured metal components using femtosecond laser ultrasonics and laser polishing

  • Experimental Verification of Contact Acoustic Nonlinearity at Rough Contact Interfaces

  • Compensation of a Second Harmonic Wave Included in an Incident Ultrasonic Wave for the Precise Measurement of the Acoustic Nonlinearity Parameter

  • Measurement of Absolute Acoustic Nonlinearity Parameter Using Laser-Ultrasonic Detection

  • Rapid Molecular Diagnostic Sensor Based on Ball-Lensed Optical Fibers

  • Porosity Evaluation of Additively Manufactured Components Using Deep Learning‑based Ultrasonic Nondestructive Testing (Editor's pick)

  • Deep Learning-Based Ultrasonic Testing to Evaluate the Porosity of Additively Manufactured Parts with Rough Surfaces

  • Analysis of the influence of surface roughness on measurement of ultrasonic nonlinearity parameter using contact-type transducer

  • Indirect Method for Measuring Absolute Acoustic Nonlinearity Parameter Using Surface Acoustic Waves with a Fully Non-Contact Laser-Ultrasonic Technique

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