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 -

NDT.net Issue - 2015-10 - NEWS

Tech Tip: To Focus or Not to Focus

E. Ginzel95
Materials Research Institute98, Waterloo, Canada
NDT.net Journal
Issue: 2015-10
Thank you to Ed Ginzel for posting at Aug-31-2015 the following topic to the forum.

About 2-3 weeks ago, one of the forum members sent me email asking me about the topic of PAUT focussing. It seems that he was at a well-known training school and the instructors there told him that he should be focussing the beam for weld inspection. No doubt he had to do this to pass the course, but it did not seem right to him so he asked me for my thoughts. I used Civa to explain why it should not be done.

The idea that training schools are telling students to do things that are not accomplishing useful results bothered me so I thought it might be helpful to put a discussion topic out to NDT.net, with some extra details (with thanks to Civa for making the explanation much more "visual").

Perhaps typical of my explanations, the item is rather long, so not suitable to fit in the normal sized discussion box. Therefore I have uploaded the thoughts as a pdf file.

To Focus or Not to Focus
|Read the Discussion in the Forum|

I would be interested to learn of other people's experience with focussed beams for general weld inspection (apart from the zonal technique).

Ed Ginzel

Materials Research Institute

More of Materials Research Institute published in NDT.net
2019-01-01: Modelling Probe Wedge and Pipe Geometry as Critical Parameters in Pipe Girth Weld Ultrasonic Inspections Using Civa Simulation Software
2018-04-01: Civa Modelling for Internal Ultrasonic Tube Testing
2018-04-01: Photoelastic Visualisation: Part 26 - The Rayleigh Wave
2017-12-01: Modelled and Visualised Sound-Fields of 1.5D Phased-array Probes
2017-11-01: Sizing and evaluation of planar defects based on Surface Diffracted Signal Loss technique by ultrasonic phased array
2017-09-01: Approximate dV/dT values for some materials
2017-08-01: Computed Tomography of Ultrasonic Pulses
2017-03-01: Low Velocity Elastomer Polymer Wedges Applied to Phased Array Probes
2016-12-01: Photoelastic Visualisation of Phased Array Sound Fields: Part 24 – The So-Called Creeping Wave – Near Surface with linear phased-array probe
2016-12-01: Photoelastic Visualisation of Phased Array Sound Fields: Part 25 – The So-Called Creeping Wave – Far Surface with linear phased-array probe
All 98 Articles & News of Materials Research Institute in NDT.net

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