where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -
648 views
Technical Discussions
Jeff Medford
NDT Inspector
Nucor Steel, USA, Joined Apr 2005, 6

Jeff Medford

NDT Inspector
Nucor Steel,
USA,
Joined Apr 2005
6
08:39 Jun-06-2006
Air Couple Testing

Has it implemented in manual application yet. Also can it possibly have a higher freq. used to ensure that the sensitivity is adaquate? Refering to 2.25 or 5 Mhz


 
 Reply 
 
Dave Forsyth
R & D
TRI/Austin, USA, Joined Nov 2001, 41

Dave Forsyth

R & D
TRI/Austin,
USA,
Joined Nov 2001
41
00:01 Jun-08-2006
Re: Air Couple Testing
----------- Start Original Message -----------
: Has it implemented in manual application yet. Also can it possibly have a higher freq. used to ensure that the sensitivity is adaquate? Refering to 2.25 or 5 Mhz
------------ End Original Message ------------

No commercial manual air-coupled UT I know of.

Air itself is the limiting factor in frequencies, sound does not propagate well in air at 2MHz, and is virtually zero propagation at any higher frequencies.

The sensitivity is not usually a function of frequency for air-coupled UT, rather it is the large impedance change at boundaries with solids. So you can get only a small fraction of energy into a solid from an air-coupled UT transducer using conventional UT techniques.

There are some interesting things that can be done with air-coupled UT that are not possible with immersion or contact UT, such as surface profiling, resonance spectroscopy, etc. There are also some engineering structures that are of very low density and air-coupled UT hasan advantage here.

Dave.




 
 Reply 
 

Product Spotlight

NEW Wheel Type Phased Array Probe

DOPPLER NEW Wheel Type Phased Array Probe, more stable, new tyre makes lesser acoustic attenuation
...
, much lighter makes easier to handle, more slim size, magnetic and mechanical encoder optional etc...more
>

Research and Application Development For NDT

Acuren’s Research and Application Development specializes in the development of advanced ultraso
...
nic inspection techniques and systems for challenging inspection applications, with an emphasis on practical solutions which are field deployable. Services include manual and automated ultrasonic inspection system development, inspection technique optimization using laboratory scale studies and ultrasonic modeling (CIVA, BeamTool), preparing technical justification for technique evaluation and qualification (Probability of Detection and sizing accuracy studies), inspection/calibration/analysis procedure preparation to support field deployment of custom techniques, and development of custom imaging algorithms to support challenging inspection applications.
>

NDT Master Lecturer

In the program both university professors and practitioners will give lectures, which guarantees the
...
oretical depth and practical inside. Academic Director: Prof. Dr. Christian Boller
The following lecturers are not complete: Prof. Tadeusz Stepinski, Prof. Wieslaw Staszewski, Prof. Frank Walther, Prof. Giovanni Bruno, Prof. Gerd Dobmann, Prof. Philippe Guy
>

Ultrasonic Testing Immersion Tanks with Unmatched Scanning Features

TecScan’s non-destructive testing Ultrasonic Immersion Tanks & scanners are designed for high pe
...
rformance and demanding NDT testing applications. Our Scan3D™ line of High Precision Immersion Tanks are specifically designed for automated ultrasonic testing of complex composites parts used in aerospace and industrial applications.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window