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YXLON Copenhagen
YXLON Copenhagen is a highly specialized, award winning Danish company with 60 years of experience in portable X-ray solutions for industrial NDT.

548 views
18:05 May-19-2009

Rudolf Chyla

R & D, NDT
Railways of the Slovak Republic (ZSR),
Slovak Republic,
Joined Nov 2000
1
PA testing thermit weld of rails

Has anyone had any success with testing thermit weld of rails using phased array?

 
08:30 May-20-2009

Joe Buckley

Consultant, ASNT L-III, Honorary Secretary of BINDT
Level X NDT, BINDT,
United Kingdom,
Joined Oct 1999
515
Re: PA testing thermit weld of rails In Reply to Rudolf Chyla at 18:05 May-19-2009 (Opening).

zoom image[zoom] Above was at 2MHz (keyboard sticky)

I did some trials on this about 4 years ago, Usuing a MHz, 24 Element transducer

Found that
1) The 'noise image' from a good weld was clearly distinguishable
2) Side drilled holes around 3mm gacve a good response.

So it all looked very encouraging. Unfortunately we never persuaded any of the Railways to buy one, So it never got seriously field tried, and there was not opportunity to find defects with the technique.

attached overlay image should give some idea.
 


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