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Teletest
Teletest Focus+ was the first system to use long-range guided wave ultrasonic testing to detect corrosion in pipelines.
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Technical Discussions
junho
NDT Inspector,
KOREA Material INSPECTION, South Korea, Joined Oct 2009, 21

junho

NDT Inspector,
KOREA Material INSPECTION,
South Korea,
Joined Oct 2009
21
02:56 Dec-29-2009
what is lateral wave ?????

I study TOFD. but I don't know that lateral wave.

what is lateral wave???

thank you

    
 
 Reply 
 
Nigel Armstrong
Engineering, - Specialist services
United Kingdom, Joined Oct 2000, 1096

Nigel Armstrong

Engineering, - Specialist services
United Kingdom,
Joined Oct 2000
1096
10:27 Dec-29-2009
Re: what is lateral wave ?????
In Reply to junho at 02:56 Dec-29-2009 (Opening).

Hello Junho

The lateral wave in TOFD is the longitudinal wave which runs directly between the transmitting and the receiving probes just sub-surface. On the unrectified A-scan it appears (with the correct set-up) as the first RF pulse after the initial pulse (main bang). This shows as an alternating positive/negative-going cycles on the B-scan display.

Hope this helps.

    
 
 Reply 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1268

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1268
15:27 Dec-29-2009
Re: what is lateral wave ?????
In Reply to junho at 02:56 Dec-29-2009 (Opening).

Junho
The lateral wave is as Nigel described it. You might find the images in a paper presented by Prof. Honarvar useful in understanding the components
http://www.ndt.net/article/tindt2008/papers/150.pdf

    
 
 Reply 
 
Carlos Correia
R & D, - -
UCV & EGROUP, Venezuela, Joined Oct 2008, 120

Carlos Correia

R & D, - -
UCV & EGROUP,
Venezuela,
Joined Oct 2008
120
17:50 Dec-29-2009
Re: what is lateral wave ?????
In Reply to Ed Ginzel at 15:27 Dec-29-2009 .

Hello Jhuno, I could be interesting for you the next link:

http://www.autsolutions.net/Creeping-waves.html

It’s a excellent explanation prepared for Mr. Ginzel and Mr. Blanshan about creeping wave where you can also understand the lateral wave since they terms are deeply connected.

Another very interesting link

http://www.mri.on.ca/

Best Regards and Happy new year 2010...

    
 
 Reply 
 

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