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Laser induced phased arrays for remote ultrasonic imaging of additive manufactured components

Stratoudaki, Theodosia and Javadi, Yashar and Kerr, William and Wilcox, Paul D. and Pieris, Don and Clark, Matt (2018) Laser induced phased arrays for remote ultrasonic imaging of additive manufactured components. In: 57th Annual Conference of the British Institute of Non-Destructive Testing, NDT 2018, 2018-09-10 - 2018-09-12.

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Abstract

Laser Induced Phased Arrays (LIPAs) use laser ultrasonics to generate and detect ultrasound, synthesising an ultrasonic phased array in post processing. Full Matrix Capture (FMC) is done by scanning the laser generation and detection beams at every possible combination with respect to position. The acquired data are used to synthesise a focus at every point in the section imaged, using the Total Focusing Method (TFM). The result is greatly improved imaging quality compared to conventional laser ultrasonic imaging. As the technique is remote and couplant free it lends itself well to extreme environments, such as the Additive Manufacturing (AM) process. We will present remote ultrasonic TFM images of additive manufactured components made of aluminium, using Selective Laser Melting (SLM). LIPAs were synthesised under the base plate of the built, to demonstrate the capability for in situ process monitoring. The aluminium built incorporated six side through holes of 0.5-1mm diameter size, in its design, in order to simulate process occurring defects. These were located as deep as 25mm below the surface of the component and were successfully imaged using LIPAs. TFM images from transducer based phased arrays will also be presented to complement the analysis.

Item type: Conference or Workshop Item (Paper)
ID code: 67062
Keywords: laser induced phased arrays, ultrasound, full matrix capture, Electrical engineering. Electronics Nuclear engineering, Mechanical Engineering, Industrial and Manufacturing Engineering, Safety, Risk, Reliability and Quality
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Faculty of Engineering > Design, Manufacture and Engineering Management
Depositing user: Pure Administrator
Date deposited: 21 Feb 2019 14:25
Last modified: 06 Apr 2019 00:30
Related URLs:
URI: https://strathprints.strath.ac.uk/id/eprint/67062
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