Thickness and grain size monitoring in seamless tube-making process using laser ultrasonics

Autor:	Gerald V. Jeskey, Silvio E. Kruger, Daniel Lévesque, Jean-Pierre Monchalin, M. Choquet, Guy Lamouche, R. Kolarik
Rok vydání:	2006
Předmět:	Laser ultrasonics Engineering Engineering drawing business.industry Mechanical Engineering Acoustics Condensed Matter Physics Temperature measurement Grain size Metrology Nondestructive testing Metallography General Materials Science Tube (fluid conveyance) Ultrasonic sensor business
Zdroj:	NDT & E International. 39:622-626
ISSN:	0963-8695
DOI:	10.1016/j.ndteint.2006.04.009
Popis:	The seamless tube-making process often causes wall-thickness variations generally in a helical pattern along the tube length. A laser-ultrasonic system installed immediately after the final operation in tube making provides process monitoring. Tube wall thickness and temperature measurements guide the mill adjustments to achieve the desired tolerances. Using the same ultrasonic signals, additional functionality provides the ability to measure the size of austenite grains. A signal processing approach based on a single echo analysis is used for determining wall thickness and austenitic grain size in relatively thick materials. Discussions review challenges specific to on-line conditions such as limited signal-to-noise ratio. A statistical comparison with metallographic results shows that the laser-ultrasonic grain sizes determined on-line have at least the same accuracy.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c76c496d4883e71984383af1e1f42ff8 https://doi.org/10.1016/j.ndteint.2006.04.009 Zobrazit plný text záznamu Full Text from ScienceDirect