Graduation Semester and Year
Fall 2024
Language
English
Document Type
Dissertation
Degree Name
Doctor of Philosophy in Mechanical Engineering
Department
Mechanical and Aerospace Engineering
First Advisor
Haiying Huang
Abstract
The Ultrasound Fabry-Pérot Resonator (UFPR) is introduced as a novel technique for non-destructive evaluation and material characterization. By adapting optical Fabry-Pérot Resonator principles to ultrasonic systems, UFPR inherits advantages such as enhanced sensitivity, reduced uncertainty, and the capabilities of frequency-dependent analysis and fringe spectral analysis. This study focuses on UFPR’s application to ultrasonic attenuation characterization and sensitization detection in aluminum-magnesium alloys, which are critical for understanding microstructural changes and improving material performance.
The research was conducted in three systematic steps. First, time-frequency analysis was utilized to examine frequency-dependent attenuation behavior, establishing a foundation for ultrasonic attenuation characterization. Second, longitudinal UFPR was developed and validated to characterize ultrasonic attenuation through fringe spectral analysis, offering a novel approach to measuring attenuation parameters. Third, the UFPR method was extended to flexural modes to address dispersive wave challenges, enabling characterization in a lower frequency inspection range and directly correlating attenuation parameters with the Degree of Sensitization (DoS). The DoS was determined using Nitric Acid Mass Loss Tests, providing a benchmark for comparison.
The study demonstrated that UFPR-based fringe frequency domain analysis enhances sensitivity and reduces uncertainty compared to conventional ultrasonic methods. Strong correlations between attenuation parameters and DoS were established, validating UFPR’s potential for advanced material characterization. By leveraging fringe frequency analysis and extending the principles of Fabry-Pérot Resonator to ultrasonic systems, UFPR offers a robust and reliable method for material characterization and microstructural change detection.
Keywords
Ultrasound attenuation, Fabry-Pérot interferometer, Fabry-Pérot resonator, Fringe analysis, sensitization, Microstructural change, Aluminum alloy, Nondestructive evaluation, Acoustical testing, Laser ultrasonic
Disciplines
Other Mechanical Engineering
License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Wang, Songwei, "INTRODUCE ULTRASOUND FABRY-PÉROT RESONATOR FOR ATTENUATION CHARACTERIZATION AND SENSITIZATION DETECTION OF ALUMINUM-MAGNESIUM ALLOYS" (2024). Mechanical and Aerospace Engineering Dissertations. 420.
https://mavmatrix.uta.edu/mechaerospace_dissertations/420