Ultrasonic array inspection for additive manufacturing components using full matrix capture

Speaker:
Xu, Na; China

Authors:
Na, X.; AECC Beijing Institute of Aeronautical Materials; China

ID: ECNDT-0418-2018
Session: Additive Manufacturing – ultrasound
Room: H1
Date: 2018-06-12
Time: 09:40 - 10:00

Additive manufacturing (AM) processes make three-dimensional parts directly from CAD models by adding materials layer by layer. Owing to the fabrication procedure by using selective laser melting (SLM) or electron beam melting (EBM), potential defects and inaccuracies are often very small in size. Therefore, an adequate non-destructive inspection of such parts is highly necessary in order to ensure the quality of parts especially utilized for aerospace components. In this paper ultrasonic array inspection for titanium alloy structures produced by additive manufacturing processes were researched. Firstly, wave propagation characteristics in titanium alloy samples were described and their ultrasonic velocity and attenuation characteristics were measured. Secondly, full matrix capture(FMC) algorithms, as an advanced post-processing method of ultrasonic array inspection, have been developed for the inspection of additive manufacturing samples. Thirdly, the conventional ultrasonic phased array inspection was also carried out using the same probes and similar parameters. Finally, the two ultrasonic array techniques were compared in terms of detectability, signal-to-noise ratio, amplitude response and overall image quality in order to determine the best technique for the inspection of additive manufacturing products. The results show that full matrix capture technique is more potential for ultrasonic inspection of additive manufacturing components.