Quantitative evaluation of yield strength degradation by using nonlinear ultrasonic techniques

2018 ◽  
Author(s):  
Kyung-Young Jhang ◽  
Jongbeom Kim ◽  
Dong-Gi Song ◽  
Chang-Soo Kim
Keyword(s):  
Yield Strength ◽  
Quantitative Evaluation ◽  
Strength Degradation ◽  
Nonlinear Ultrasonic ◽  
Ultrasonic Techniques

scholarly journals Monitoring of Thermal Aging of Aluminum Alloy via Nonlinear Propagation of Acoustic Pulses Generated and Detected by Lasers

2019 ◽  
Vol 9 (6) ◽  
pp. 1191 ◽  
Author(s):  
Mengmeng Li ◽  
Alexey Lomonosov ◽  
Zhonghua Shen ◽  
Hogeon Seo ◽  
Kyung-Young Jhang ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Yield Strength ◽  
Thermal Aging ◽  
Finite Amplitude ◽  
Quadratic Nonlinearity ◽  
Laser Ultrasonic ◽  
Ultrasonic Techniques ◽  
Non Destructive

Nonlinear acoustic techniques are established tools for the characterization of micro-inhomogeneous materials with higher sensitivity, compared to linear ultrasonic techniques. In particular, the evaluation of material elastic quadratic nonlinearity via the detection of the second harmonic generation by acoustic waves is known to provide an assessment of the state variation of heat treated micro-structured materials. We report on the first application for non-destructive diagnostics of material thermal aging of finite-amplitude longitudinal acoustic pulses generated and detected by lasers. Finite-amplitude longitudinal pulses were launched in aluminum alloy samples by deposited liquid-suspended carbon particles layer irradiated by a nanosecond laser source. An out-of-plane displacement at the epicenter of the opposite sample surface was measured by an interferometer. This laser ultrasonic technique provided an opportunity to study the propagation in aluminum alloys of finite-amplitude acoustic pulses with a strain up to 5 × 10−3. The experiments revealed a signature of the hysteretic quadratic nonlinearity of micro-structured material manifested in an increase of the duration of detected acoustic pulses with an increase of their amplitude. The parameter of the hysteretic quadratic nonlinearity of the aluminum alloy (Al6061) was found to be of the order of 100 and to exhibit more than 50% variations in the process of the alloy thermal aging. By comparing the measured parameter of the hysteretic quadratic nonlinearity in aluminum alloys that were subjected to heat-treatment at 220 °C for different times (0 min, 20 min, 40 min, 1 h, 2 h, 10 h, 100 h, and 1000 h), with measurements of yield strength in same samples, it was established that the extrema in the dependence of the hysteretic nonlinearity and of the yield strength of this alloy on heat treatment time are correlated. This experimental observation provides the background for future research with the application goal of suggested nonlinear laser ultrasonic techniques for non-destructive evaluation of alloys’ strength and rigidity in the process of their heat treatment.

Monitoring damage in composite plates from crack initiation to macro-crack propagation combining linear and nonlinear ultrasonic techniques

2020 ◽  
pp. 147592172092292
Author(s):  
Hamad Alnuaimi ◽  
Umar Amjad ◽  
Pietro Russo ◽  
Valentina Lopresto ◽  
Tribikram Kundu
Keyword(s):  
Composite Plates ◽  
Fiber Reinforced Polymer ◽  
Reinforced Polymer ◽  
Damage Progression ◽  
Nonlinear Ultrasonic ◽  
Ultrasonic Techniques ◽  
Linear And Nonlinear ◽  
Ultrasonic Parameters ◽  
Peak Count ◽  
Ultrasonic Parameter

In this article, a holistic technique for sensing damage initiation, as well as damage progression in composite plates, is presented combining linear and nonlinear ultrasonic techniques. For this investigation, multiple sets of composite plate specimens made of two different composite materials were fabricated to check if the proposed technique works for different types of specimens. The specimens were damaged by impact loading and then inspected by propagating Lamb waves through them. Different failure mechanisms, such as fiber breaks, matrix cracking, debonding, and delamination, cause composite damage. Two groups of composite specimens that were fabricated and damaged were glass fiber–reinforced polymer composite and basalt fiber–reinforced polymer composite. A chirp signal excited by PZT (lead zirconate titanate) transducer was propagated through undamaged and damaged specimens to investigate the effects of varying degrees of damage on the recorded signals. Both linear and nonlinear ultrasonic parameters were extracted from the recorded signals and analyzed. The change in the linear ultrasonic parameters such as the wave speed and attenuation with damage progression were recorded. A new nonlinear ultrasonic parameter, the sideband peak count or sideband peak count-index, is also introduced and calculated from the recorded signals. It is observed that the nonlinear ultrasonic parameter can monitor the early stage of damage progression better than the linear ultrasonic parameters, while some linear ultrasonic parameters are more effective than the nonlinear ultrasonic parameter for monitoring the advanced stage of damage. Therefore, a combination of linear ultrasonic and nonlinear ultrasonic analyses is ideal for the holistic monitoring of the composite panels from the crack nucleation stage to the structural failure stage.

scholarly journals Dynamic acousto-elastic testing of concrete with a coda-wave probe: comparison with standard linear and nonlinear ultrasonic techniques

Ultrasonics ◽  
2017 ◽  
Vol 81 ◽  
pp. 59-65 ◽  
Author(s):  
Parisa Shokouhi ◽  
Jacques Rivière ◽  
Colton R. Lake ◽  
Pierre-Yves Le Bas ◽  
T.J. Ulrich
Keyword(s):  
Coda Wave ◽  
Nonlinear Ultrasonic ◽  
Standard Linear ◽  
Ultrasonic Techniques ◽  
Linear And Nonlinear

scholarly journals Nonlinear Ultrasonic Guided Wave Method Using Semi-Analytical Finite Element (SAFE) Technique on a Damaged SWO-V Spring Coil

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 752
Author(s):  
Jeongnam Kim ◽  
Junpil Park ◽  
Bo Zhu ◽  
Younho Cho
Keyword(s):  
Finite Element ◽  
Shot Peening ◽  
Guided Wave ◽  
Phase Matching ◽  
Linear Elastic ◽  
Ultrasonic Guided Wave ◽  
Nonlinear Ultrasonic ◽  
Safe Technique ◽  
Ultrasonic Techniques ◽  
Non Destructive

This work presents a non-destructive method for quantitative essessment of fatigue damage of materials with linear elastic properties using nonlinear ultrasonic techniques. A nonlinear study was conducted on these materials with fatigue and shot peening processing using a nonlinear ultrasonic technique. A numerical method based on the semi-analytical finite element (SAFE) technique, was used to obtain the phase-matching modes of the specimens. Experiments confirm that the nonlinearity for shot peening and samples with a certain level of fatigue shows a tendency to increase with levels of fatigue.

scholarly journals Technical Report on the Status of Nonlinear Ultrasonic Techniques for Non-Destructive Inspection

2014 ◽  
Author(s):  
Brian Anderson ◽  
Marcel Remillieux ◽  
Sylvain Haupert ◽  
Yoshikazu Ohara ◽  
Colton Lake ◽  
...  
Keyword(s):  
Technical Report ◽  
Nonlinear Ultrasonic ◽  
The Status ◽  
Ultrasonic Techniques ◽  
Non Destructive

scholarly journals Nonlinear Ultrasonic Techniques to Monitor Radiation Damage in RPV and Internal Components

2015 ◽  
Author(s):  
Laurence Jacobs ◽  
Jin-Yeon Kim ◽  
Jisnmin Qu ◽  
Pradeep Ramuhalli ◽  
Joe Wall
Keyword(s):  
Radiation Damage ◽  
Nonlinear Ultrasonic ◽  
Ultrasonic Techniques
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