Abstract
Ultrasonic backscattering from polycrystalline materials with elongated grains is investigated. A normal incident line-focus transducer is employed such that refracted longitudinal and transverse waves are focused within the polycrystal and scatter at grain boundaries back to the transducer. A ray-based scattering model is developed to explain the dependence of the statistics of scattering measurements on grain elongation. The spatial variance of measured scattered signals from Al alloy (7475-T7) is compared to the model. This work promotes the ultrasonic backscatter technique for monitoring grain elongation of metals using one transducer with access to a single sample face.
Original language | English (US) |
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Pages (from-to) | 79-83 |
Number of pages | 5 |
Journal | Ultrasonics |
Volume | 82 |
DOIs | |
State | Published - Jan 2018 |
Keywords
- Attenuation
- Backscatter
- Grain elongation
- Grain size
- Scattering
ASJC Scopus subject areas
- Acoustics and Ultrasonics