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Development of Laser-Based Resonant Ultrasound Spectroscopy(Laser-RUS) System for the Detection of Micro Crack in Materials  

Kang, Young-June (Department of Mechanical Design, Chonbuk Univ.)
Kim, Jin-Soo (Division of Quantum Optics, KAERI)
Park, Seung-Kyu (Division of Quantum Optics, KAERI)
Baik, Sung-Hoon (Division of Quantum Optics, KAERI)
Choi, Nag-Jung (Department of Mechanical Design, Chonbuk Univ.)
Publication Information
Journal of the Korean Society for Precision Engineering / v.27, no.1, 2010 , pp. 41-48 More about this Journal
Abstract
Non-contacting, laser-based resonant ultrasound spectroscopy (L-RUS) was applied to characterize the microstructure of a material. L-RUS is widely used by virtue of its many features. Firstly, L-RUS can be used to measure mechanical damping which related to the microstructural variations (grain boundary, grain size, precipitation, defects, dislocations etc). Secondly, L-RUS technology can be applied to various areas, such as the noncontact and nondestructive quality test for precision components as well as noncontact and nondestructive materials characterization. In addition, L-RUS technology can measure the whole field resonant frequency at once. In this paper, we evaluated material characteristics such as resonant frequency, nonlinear propagation characteristic through the development of Laser-Based Resonant Ultrasound spectroscopy (Laser-RUS) System for the detection of Micro Crack in Materials.
Keywords
Laser-based Resonant Ultrasound Spectroscopy; Micro Crack; Resonant; Ultrasound; Spectroscopy; Non-contact; Non-destructive;
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