Jian, Xiaoming, Baillie, Iain and Dixon, S. (2007) Steel billet inspection using laser-EMAT system. Journal of Physics D: Applied Physics, Vol.40 (No.5). pp. 1501-1506. doi:10.1088/0022-3727/40/5/029 ISSN 0022-3727.

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Abstract

A pulsed laser to generate ultrasound has been used with an electromagnetic acoustic transducer (EMAT) to successfully detect ultrasonic waves for the fast online inspection of steel billets. Simulations of the ultrasonic signals have been performed by the finite element method to explain the laser-generated ultrasonic field and to compare it favourably with the signals detected by a water-cooled EMAT. With an understanding of the nature of the generated ultrasonic field, the separation between the laser and EMAT can be optimized for internal defect inspection using bulk waves and surface defect inspection, using Rayleigh waves, as the pulsed laser source can generate both these wave modes simultaneously.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title:	Journal of Physics D: Applied Physics
Publisher:	IOP Publishing
ISSN:	0022-3727
Official Date:	7 March 2007
Dates:	Date Event 7 March 2007 Published
Volume:	Vol.40
Number:	No.5
Number of Pages:	6
Page Range:	pp. 1501-1506
DOI:	10.1088/0022-3727/40/5/029
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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