Laser ultrasonics can provide micron- to nanometer-scale elastic property information commensurate with microstructure heterogeneity. Examples include monitoring recrystallization at high temperatures, measuring elastic and dimensional properties of nano-structures, mapping porosity evolution in ceramics, and imaging delamination in composites. Laser ultrasonics is non-contacting, can be used remotely, and is well suited to investigate flaws in materials subjected to multiple environments including extreme.
Laser ultrasound has several advantages over contact techniques, such as:
- Laser ultrasound provides important information on small length scales without the need for specimen or sample miniaturization.
- Laser ultrasound is versatile and well suited for complex-geometries.
- Laser ultrasound can scan large areas quickly.
From cryogenic temperatures to ~1000°C. Material surface must be polished.
- Uses tightly focused lasers to generate and detect ultrasound.
- Can be used to locate flaws in materials with complex shapes.
- Well suited to measure high-temperature elastic properties.
Work must be conducted at INL.
Name: Dr. David Hurley, Directorate Fellow
Phone: (208) 526-3665
- R. S. Schley, David H. Hurley, and Z. Hua, Optical Fiber Technique for in-reactor mechanical properties measurement, Review of Progress in Quantitative Nondestructive Evaluation, 32B, 1701 (2013).
- D. H. Hurley, S. J. Reese, F. Farzbod, Application of laser-based resonant ultrasound spectroscopy to study texture in copper, Journal of Applied Physics, 111, 53527 (2012).
- D. H. Hurley, O. B. Wright, O. Matsuda, V. E. Gusev and O. V. Kolosov, Laser Picosecond Acoustics in Isotropic and Anisotropic Materials, Ultrasonics, 38, 470 (2000).