Assessment of Thermal Degradation by Cumulative Variation of Ultrasonic Nonlinear Parameter
http://link.springer.com/article/10.1007/s12541-017-0003-x
Assessment of thermal degradation by cumulative variation of ultrasonic nonlinear parameter
- Cite this article as:
- Kim, J. & Jhang, KY. Int. J. Precis. Eng. Manuf. (2017) 18: 23. doi:10.1007/s12541-017-0003-x
- 6Downloads
Abstract
The ultrasonic nonlinear parameter β has been studied for the evaluation of material degradation. However, there is a limit to the assessment of degradation induced by thermal aging in aluminum alloy because the nonlinear parameter may fluctuate with the aging time and thus it has not one-to-one correspondence with the thermal degradation. In order to overcome such limitation, we propose a cumulative nonlinear parameter βc defined by the accumulation of variation in the nonlinear parameter over the aging time. For verifying the usefulness of the proposed parameter, two kinds of aluminum alloy specimens heat-treated with different aging temperatures and aging times were tested. After the ultrasonic test has been completed, the tensile test was conducted for all specimens to measure the yield strength as a quantitative index of material degradation. Results showed that the nonlinear parameter β fluctuated in directions of both increase and decrease, while the strength decreased one-sidedly with the increase of aging time. On the other hand, the proposed parameter βc was one-sidedly increased, which showed strong exponential negative correlation with the yield strength. These tendencies were similar in different material and different aging temperature.
-
Porosity evaluation of additive manufactured parts: ultrasonic testing and eddy current testing
-
Imaging and Sizing of Surface Defects Using Synthetic Aperture Focusing of Laser-generated Surface Waves
-
Variation of Acoustoelastic Effect in Al6061-T6 according to Heat Treatment Time
-
High power CW laser-induced damage of CMOS image sensor
-
Measurement of Ultrasonic Nonlinear Parameter by Using Non-Contact Ultrasonic Receiver
-
Study on the Nonlinear Electromagnetic Acoustic Resonance Method for the Evaluation of Hidden Damage in a Metallic Material
-
Evaluation of Ultrasonic Nonlinear Characteristics in Artificially Aged Al6061-T6
-
Simulations for Internal Defect Inspection using Laser Generated Ultrasonic Wave in Ablation Regime
-
Feasibility of MFC (Macro-Fiber Composite) Transducers for Guided Wave Technique
-
Initial Second Harmonic Generation in Narrowband Surface Waves by Multi-Line Laser Beams for Two Kinds of Spatial Energy Profile Models
-
Evaluation of Ultrasonic Nonlinear Characteristics in Heat-Treated Aluminum Alloy
-
A6061 합금의 석출경화 열처리에 따른 탄성파의 음향 특성 연구
-
Thermal Damage Characterization of Silicon Wafer Subjected to CW Laser Beam
-
Feasibility of MFC (Macro-Fiber Composite) Transducers for Guided Wave Technique
-
Initial Second Harmonic Generation in Narrowband Surface Waves by Multi-Line Laser Beams for Two Kinds of Spatial Energy Profile
-
Evaluation of Ultrasonic Nonlinear Characteristics in Heat-Treated Aluminum Alloy
-
Fully Non-Contact Assessment of Acoustic Nonlinearity According to Plastic Deformation in Al6061 Alloy
-
Imaging of Harmonic Wave Generated by Contact Acoustic Nonlinearity in Obliquely Incident Ultrasonic Wave
-
Frequency Characteristics of Surface Wave Generated by Single-Line Pulsed Laser Beam with Two Kinds of Spatial Energy Profile Models: Gaussian and Square-Like
-
레이저 여기표면파의 음향비선형성을 이용한 Al6061 합금의 소성변형평가