Evaluation of laser ultrasonic testing for inspection of metal additive manufacturing

Sarah Everton; Phill Dickens; Chris Tuck; Ben Dutton

doi:10.1117/12.2078768

16 March 2015 Evaluation of laser ultrasonic testing for inspection of metal additive manufacturing

Sarah Everton, Phill Dickens, Chris Tuck, Ben Dutton

Proceedings Volume 9353, Laser 3D Manufacturing II; 935316 (2015) https://doi.org/10.1117/12.2078768
Event: SPIE LASE, 2015, San Francisco, California, United States

Abstract

Additive Manufacturing (AM) offers a number of benefits over conventional processes. However, in order for these benefits to be realised, further development and integration of suitable monitoring and closed loop control systems are needed. Laser Ultrasonic Testing (LUT) is an inspection technology which shows potential for in-situ monitoring of metallic AM processes. Non-contact measurements can be performed on curved surfaces and in difficult to reach areas, even at elevated temperatures. Interrogation of each build layer generates defect information which can be used to highlight processing errors and allow for real-time modification of processing parameters, enabling improved component quality and yield.

This study evaluates the use of laser-generated surface waves to detect artificially generated defects in titanium alloy (Ti- 6Al-4V) samples produced by laser-based Powder Bed Fusion. The trials undertaken utilise the latest LUT equipment, recently installed at Manufacturing Technology Centre which is capable of being controlled remotely. This will allow the system to optimise or adapt “on-the-fly”, simplifying the eventual integration of the system within an AM machine.

Citation Download Citation

Sarah Everton, Phill Dickens, Chris Tuck, and Ben Dutton "Evaluation of laser ultrasonic testing for inspection of metal additive manufacturing", Proc. SPIE 9353, Laser 3D Manufacturing II, 935316 (16 March 2015); https://doi.org/10.1117/12.2078768

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