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Technical Discussions
George Crowe
Consultant, AEROSPACE NDT
Self Employed, United Kingdom, Joined May 2013, 30

George Crowe

Consultant, AEROSPACE NDT
Self Employed,
United Kingdom,
Joined May 2013
30
10:45 May-08-2017
Ultrasonic Longitudinal wave transmission at an oil wetted interface

I have an ultrasonic Longitudinal wave transmission at an oil wetted, air free, flat, smooth interface between two pieces of similar flat steel. The angle of incidence of the longitudinal wave is 68 degrees from the normal.
Can anyone detail the transmission/reflection physics of the beam at the faying surface interface as I seem to lose the signal!

 
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Godfrey hands
Consultant,
PRI Nadcap, United Kingdom, Joined Nov 1998, 304

Godfrey hands

Consultant,
PRI Nadcap,
United Kingdom,
Joined Nov 1998
304
09:13 May-15-2017
Re: Ultrasonic Longitudinal wave transmission at an oil wetted interface
In Reply to George Crowe at 10:45 May-08-2017 (Opening).

George,
Krautkramer (Ultrasonic Testing of Materials) shows a table at the rear of the book "Reflection at free boundary of steel", where the reflected wave is at a minimum at 68 degrees incidence, and at the same time, the reflected Transverse wave is at a maximum.
You have to consider that the oil wetted and air free surface will also act partially as a free boundary.
I could scan the page and email to you if required.
Godfrey

 
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