A Novel Multi-frequency Nonlinear Ultrasonic Approach for the Characterization of Annealed Polycrystalline Microstructure

A multi-frequency nonlinear ultrasonic measurement is used to characterize grain size variations and distributions unambiguously. The ultrasonic nonlinearity parameter varies linearly with grain size in the Rayleigh scattering regime but deviates from linear behavior at the Rayleigh-to-stochastic tr...

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Veröffentlicht in:	Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2019-12, Vol.50 (12), p.5567-5573
Hauptverfasser:	Abraham, Saju T., Shivaprasad, S., Sreevidya, N., Das, C. R., Albert, S. K., Venkatraman, B., Balasubramaniam, Krishnan
Format:	Artikel
Sprache:	eng
Schlagworte:	Characterization and Evaluation of Materials Chemistry and Materials Science Communication Dependence Grain size Materials Science Metallic Materials Nanotechnology Nonlinearity Parameters Rayleigh scattering Structural Materials Surfaces and Interfaces Thin Films
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Beschreibung
Zusammenfassung:	A multi-frequency nonlinear ultrasonic measurement is used to characterize grain size variations and distributions unambiguously. The ultrasonic nonlinearity parameter varies linearly with grain size in the Rayleigh scattering regime but deviates from linear behavior at the Rayleigh-to-stochastic transition zone. Frequency dependence of this parameter is found to be a reliable tool for rapid screening of materials where grain size varies widely.
ISSN:	1073-5623 1543-1940
DOI:	10.1007/s11661-019-05478-5