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 -

Acoustic Emission Consulting, Inc.
Acoustic Emission Consulting, Inc. specializes in the design of small portable AE instruments for field and lab use.

573 views
Technical Discussions
Jason G.
Jason G.
03:22 Apr-27-2007
ToFD

I know when using ToFD that you lose near surface resolution due ti the Lateral Wave riding just under the surface.
Do you also lose ID resolution as well and how affective is ToFD for detecting transverse indications?


    
 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1252

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1252
04:43 Apr-27-2007
Re: ToFD
Jason:
The dead zones are reasonably estimated using the equations provided in EN583-6. We have provided a simple TOFD calculator for this in a 2006 edition of ndt.net
http://www.ndt.net/article/v10n06/ginzel/ginzel.htm

As for transverse detection. Yes, it can be used to detect transverse flaws but the degree of rotation of the flaw expected will determine the rotation you need on the TOFD probe pair. Some flaws, like chevron cracks, MAY be detected with the normal arrangement with the beam perpendicular to the weld. Other orientations may require skewing of a TOFD pair or ideally, removing the weld cap and scanning with the beam parallel to the weld axis.
Ed

----------- Start Original Message -----------
: I know when using ToFD that you lose near surface resolution due ti the Lateral Wave riding just under the surface.
: Do you also lose ID resolution as well and how affective is ToFD for detecting transverse indications?
------------ End Original Message ------------




    
 
 

Product Spotlight

IRIS 9000Plus - Introducing the next generation of heat exchanger inspection.

Representing the seventh generation of the IRIS system, the IRIS 9000 Plus has nearly 200 years of c
...
ombined field inspection experience incorporated in its design. This experience combined with a strong commitment to quality and a history of innovation has made Iris Inspection Services® the undisputed leader in IRIS technology.
>

High-end Ultrasonic Flaw Detector with 32:128PR PAUT and 2-ch TOFD: SyncScan 2

SIUI’s newly launched SyncScan 2, is a high-end ultrasonic flaw detector with 32:128PR PAUT and
...
2-ch TOFD, which can maximize your efficiency for PA and TOFD. ● Support PA/TOFD/UT ● 32-ch PA is more suitable for inspection on extra-thick wall and high-attenuation material. ● 32-ch PA and 2-ch TOFD work simultaneously. ● Support PR mode for corrosion inspection.
>

Robotic laser shearography enables 100% inspection of complex, flight-critical composite structures

An article in “Composites World Magazine” showcases Non Destructive Testing of aero-structures
...
with Laser Shearography. Over the years Dantec Dynamics has supplied many solutions for the aerospace industry. Referring to specific customer projects several of these cases are examined to outline the advantages of using Laser Shearography for automated defect detection.
>

NovaScope 6000

The all-digital Novascope 6000 is a portable, ultra-high precision thickness gauge for high-speed
...
thickness measurement. Novascope 6000 has unmatched capabilities and unique features including: •Superior Resolution with high contrast, high-speed color RF display •High pulser voltage •Real-time video output •Increased internal/external data storage •Programmable SetUp features •Battery & AC Powered
>

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