Looking for Forge welding failures.

Joe Cabaup

Joe Cabaup

Joined
Jun 13, 2004
Messages
216
Hello all:

I am looking for a few donated forge welding failures to serve as part of a study on how Ultrasonic Flaw testing and other NDT methods can determine if forge welding was successful before any more work or grinding was performed on the billet.

I am hoping to find examples of poor or lack of fusion, de-lamination, inclusions and anythings else that could go wrong. Previously, I had my own sample of a lack of fusion between layers. I had not ground the slag off and hoped that the flux would remove it before the forge welding. It had left a layer of slag that I only found after I had started the profiling of the blade. Unfortunately, I lost this sample during my move. Now I don't have a place to forge yet but I would like to start this study this spring.

I work for a Nondestructive Testing and Evaluation company and I have access to such methods as Penetrant Inspection, Magnetic Particle inspection, Ultrasound, Eddy Current and Industrial Xray equipment. I also am restarting knifemaking again, now that a friend as donated space in his garage.

Please email or PM me if you can help me out. Thank you.
 
I hope to be there, if there is any room left. If not, I could pay to have them shipped to me.

Thank you in advance.
 
how about a wad of screwed up cable damascus? i think I got a chunk of half@$$ed forge welded cable somewhere that you could use... lemme see if I can find it for ya

I wont be at the hammer-in :( but I could stick it in the mail!)
 
J.S. Carter said:
how about a wad of screwed up cable damascus? i think I got a chunk of half@$$ed forge welded cable somewhere that you could use... lemme see if I can find it for ya

I wont be at the hammer-in :( but I could stick it in the mail!)
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Let me know how much to ship to 04106. I could Paypal or send a MO for the shipping fees.
 
Joe, I am sure that I got more than a few hanging around the Smithy.:eek::eek:;)
I believe that The BBBB Beaver is in the same field as you.
 
Yes you can find all kinds of stuff in steel with ultrasonics.I was very involved with NDT years ago and we developed methods of looking for small inclusions. It might be useful in the initial billet as a delamination is easily picked up if it's perpendicular to the beam. Once the billet is twisted delaminations parallel to the beam would be much harder to find. I wonder if you would get indications of each of the laminations based just on differences of the steels.
 
mete said:
Yes you can find all kinds of stuff in steel with ultrasonics.I was very involved with NDT years ago and we developed methods of looking for small inclusions. It might be useful in the initial billet as a delamination is easily picked up if it's perpendicular to the beam. Once the billet is twisted delaminations parallel to the beam would be much harder to find. I wonder if you would get indications of each of the laminations based just on differences of the steels.
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Mete, I was hoping you'd come in on this thread!

The straight beam technique would pick up delaminations and slag layers before the twisting but I am thinking of using shear wave as well when testing twisted billets. We scan bar stock for several machining companies and have to use both straight beam and shear wave to ensure that we get coverage.

As for the echo coming back from each layer of lamination, I think that the impedance ratio of the carbon steels is low enough not to cause a reflection.

Of course, what I come up with in my head and what actually happens in the field differ at times :rolleyes: so I hope to test as much as I can.

IG: I've talked shop to Beaver a couple of hammer-in's ago. Now I have access to all the cool equipment that the big companies use :D
 
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