About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
NEW TIME (was 10:25 am) Nondestructive Ultrasound Evaluation of Additively Manufactured Wear Coatings |
Author(s) |
Ziyad M. Smoqi, Luz D Sotelo, Aniruddha Gaikwad, Joseph A Turner, Prahalada Rao |
On-Site Speaker (Planned) |
Ziyad M. Smoqi |
Abstract Scope |
In this work, ultrasound surface waves were used to evaluate coatings deposited via directed energy deposition (DED) additive manufacturing process. Specifically, we evaluated the quality of Stellite 21 coated on Inconel 718 substrate. The surface wave speed and diffuse backscattered amplitude of the ultrasound waves were correlated with the microstructure heterogeneity, cracking, and warpage of the coating. Three different frequencies were used to excite surface waves with different penetration depths. The signals obtained were used to quantify and compare the surface wave speed and surface wave-diffuse ultrasonic backscatter from five different DED-processed Stellite coated samples. Considering destructive metallurgical characterization as a reference, surface wave measurements were found to be effective for examining coating integrity; the backscatter amplitude of the surface waves was correlated with the microstructure and crack density. These flaws also change the stress state of the coating and consequently the surface wave propagation speed and its scattering behavior. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |