In-situ Laser ultrasound-based Rayleigh Wave Process Monitoring of DED-AM Metals
Source abstract
Abstract
A laser ultrasound system is integrated into a directed energy deposition additive manufacturing (DED-AM) chamber to use Rayleigh waves for process monitoring in a noncontact layer-by-layer mode. Layers of Ti-6Al-4 V are deposited and then interrogated with ultrasonic Rayleigh waves that are sensitive to flaws and material nonuniformities. The novel integrated material processing and monitoring system is described in detail. Process parameters are intentionally altered to create flaws and anomalies to demonstrate some capabilities of the monitoring system. The generation laser actuates either broadband pulses with a cylindrical lens or narrowband wave packets with a slit mask, which are received in through-transmission mode by a laser interferometer despite the inherent surface roughness. Flaws are detected through comparison to a reference state.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · Welding Techniques and Residual Stresses · Thermography and Photoacoustic Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Engineering Science and Mechanics, Penn State, University Park, USA
Penn State Applied Research Laboratory, University Park, USA
Funding
NSF · U.S. Government
References (62)
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