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Multi-Mode Nonlinear Resonant Ultrasound Spectroscopy (MM-NRUS) for Quality Control of Additively Manufactured Metals

Year: 2026

Type: article

Abstract: Nonlinear Resonant Ultrasound Spectroscopy (NRUS) has emerged as an effective tool for detecting and assessing microdamage, especially in the context of geological materials. This contribution investigates the value of NRUS for quality control of Additively Manufactured (AM) metals. In classical NRUS approach, a single resonant mode (most often the first-order longitudinal mode in case of beam-like structures) is excited at different excitation amplitudes. Monitoring the nonlinear response, for example amplitude-dependent softening and relaxation, gives insight in the structural health condition of the tested part. However, relying on a single resonant mode brings some limitations, it only provides sensitivity to microdamage in those areas which are near the anti-nodes. Therefore, we propose a Multi-Mode Nonlinear Resonant Ultrasound Spectroscopy (MM-NRUS) methodology in which multiple longitudinal, flexural, and/or torsional modes are triggered, either separately or simultaneously. Analysis of the softening and relaxation behavior of each triggered resonant mode gives a more complete and in-depth view on the structural health condition of the tested part. Results are presented on a large set of AM metal parts containing different types and levels of distributed or localized microdamage.

Source: e-Journal of Nondestructive Testing

DOI: 10.58286/33196

Authors: Rui Zhang, Adil Han Orta, FlandersMake@UGent – corelab MIRO, Mathias Kersemans

Language: English

Topic: Ultrasonics and Acoustic Wave Propagation

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

Funder: Fonds Wetenschappelijk Onderzoek

Award: Quality control of AM metal parts by linear and nonlinear resonance testing integrated with machine learning

OpenAlex ID: W7167282944

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