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 -

1265 views
Technical Discussions
Paulo
Paulo
06:44 Sep-14-2007
Phased Array for Stainless Stell welds

Hello people!!!
Does anybody had already tried to do stainless stell weld inspection with phased array??Have any procedure available?
Thank you!

Paulo


 
 Reply 
 
Michael Moles †2014 *1948
, Joined ,
08:26 Sep-14-2007
Re: Phased Array for Stainless Stell welds
----------- Start Original Message -----------
: Hello people!!!
: Does anybody had already tried to do stainless stell weld inspection with phased array??Have any procedure available?
: Thank you!
: Paulo
------------ End Original Message ------------

Paulo:
Lot's of companies have inspected stainless steels with phased arrays, and procedures may be available from the right people. if you are looking for contacts, please contact me directly by e-mail. You should also give some specifications, e.g. type of stainless, thickness, expected defects etc.
Yours,
Michael



 
 Reply 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1303

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1303
08:29 Sep-14-2007
Re: Phased Array for Stainless Stell welds
Paulo:
whether the ultrasound is generated by a single element or a phased array probe the issues for "ultrasonic" inspection for austenitic materials remain the same.

You will still need to assess what the best frequency and wave mode (compression or shear) will be to achieve the results you are trying for. Phased arrays may provide interesting and useful options for beam angle, Tandem techniques and TRL methods but they are still subject to the same issues of scatter and absorption as any mechanical wave pulse.
Ed


----------- Start Original Message -----------
: Hello people!!!
: Does anybody had already tried to do stainless stell weld inspection with phased array??Have any procedure available?
: Thank you!
: Paulo
------------ End Original Message ------------




 
 Reply 
 
John Brunk
Engineering, NDT Level III
Self employed, part-time, USA, Joined Oct 1999, 162

John Brunk

Engineering, NDT Level III
Self employed, part-time,
USA,
Joined Oct 1999
162
09:11 Sep-14-2007
Re: Phased Array for Stainless Stell welds
----------- Start Original Message -----------
: Hello people!!!
: Does anybody had already tried to do stainless stell weld inspection with phased array??Have any procedure available?
: Thank you!
: Paulo
------------ End Original Message ------------

Some of the conditions that can make ultrasonic evaluation of austenitic stainless steel welds so difficult would not be helped by phased array. Large variations in velcoity and attenuation with changes in direction would cause the phased array to behave quite differently from what would be predicted in more uniform materials. In welds made from one side with one procedure, then back-gouged and the back side done with another procedure, there can be huge differences in acustic properties and a large reflection from the interface. I have sometimes used test specimens with macroetched surfaces and side-driled holes in several locations to painfully sort out an effective technique for manual inspection with several probes. It would be much less difficult to develop a phased array technique in a production environment if it were possible to start working on the inspection as the welding procedures were being developed..



 
 Reply 
 

Product Spotlight

MANTIS

MANTIS is a compact, powerful and affordable flaw detector (16:64PR), dedicated to field operators
...
. This portable equipment offers standard (electronic-, sector-, compound scan, conventional UT for pulse-echo, dual array and TOFD inspections), and advanced phased-array (real-time TFM -Total Focusing Method). MANTIS benefits from the same intuitive and user-friendly interface (CAPTURE) than Gekko for easier inspections.
>

Micro CT

nanoVoxel series has nano-scale resolution upto 500nm by using high voltage X-ray source (from 80-
...
300 kV) with micro/nano focal spot and highly sensitive flat panel detectors and unique Optical coupling detector.
>

Cygnus 6+ PRO Multi-Mode Ultrasonic Thickness Gauge

The Cygnus 6+ PRO thickness gauge is the most advance gauge within the Cygnus range with key featu
...
res including: comprehensive data logging; A-scan and B-scan display; manual gain control; Bluetooth connectivity; and much more. With its unique dual display and three measuring modes (Multiple-Echo, Echo-Echo and Single-Echo), this surface thickness gauge offers maximum versatility for inspections.
>

FMC/TFM

Next generation for Phased Array UT is here now with FMC/TFM! Have higher resolution imaging, impr
...
oved signal to noise ratio, characterize, size and analyze defects better with access to several wave mode views and save raw FMC data for higher quality analysis.  Some of the benefits are:
  • Beautiful Image! Easier to understand what you're looking at
  • Completely focused in entire image or volume
  • Much easier to define setups before inspection
  • Easier to decipher geometry echoes from real defects
  • Oriented defects (e.g. cracks) are imaged better
  • See image from different wave modes from one FMC inspection
  • FMC data can be reprocessed/analyzed without going back to the field
>

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