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 -
598 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?


 
 Reply 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1274

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1274
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 ------------




 
 Reply 
 

Product Spotlight

SONOAIR - air-coupled Phased Array Ultrasonic Inspection System

For highly attenuating materials, the performance of the system is critical. The ultrasonic sensors,
...
the scanning area and the system settings should be flexibly adapted to the test task and the material. These high expectations are met with the new and modular testing system SONOAIR. With the world’s first air-coupled phased-array UT inspection system SONOAIR we developed a technology that works with up to 4 transmitter and receiver channels with freely configurable square wave burst transmitters as wells as low noise receiving amplifiers.
>

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.
>

Immersion systems

ScanMaster ultrasonic immersion systems are designed for high throughput, multi shift operation in a
...
n industrial or lab environment. These fully integrated systems provide various scanning configurations and incorporate conventional and phased arrays technologies to support diverse applications, such as inspection of disks, bars, shafts, billets and plates. All of ScanMaster immersion systems are built from high accuracy scanning frames allowing for scanning of complex parts and include a multi-channel ultrasonic instrument with exceptional performance. The systems are approved by all major manufacturers for C-scan inspection of jet engine forged discs. Together with a comprehensive set of software modules these flexible series of systems provide the customer with the best price performance solutions.
>

iProbe - USB Phased Array Probe

Turn your PC, Laptop or Tablet into a powerful 32:64 Phased Array system with our USB powered Phas
...
ed Array iProbe and inspection software package. Perform affordable weld inspection and corrosion mapping inspections with this powerful but small system. The probe has a 100V pulser, 8K PRF, dual axis encoder input and achieves outstanding signal quality.
>

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