Acoustic annealing?

[Salmon Egg]

I just recently heard that acoustic excitation has been used to anneal
welds as the are being made. Crudely, I presume that it would be
analogous to using a tamper for compacting concrete.

Please tell me where I can find more information on the subject.

[Angelo Campanella]

Post by Salmon Egg
I just recently heard that acoustic excitation has been used to anneal
welds as the are being made. Crudely, I presume that it would be
analogous to using a tamper for compacting concrete.

Look at US patent # 7,344,609 B2 (Stanikov)

[Salmon Egg]

Post by Angelo Campanella

Post by Salmon Egg
I just recently heard that acoustic excitation has been used to anneal
welds as the are being made. Crudely, I presume that it would be
analogous to using a tamper for compacting concrete.

Look at US patent # 7,344,609 B2 (Stanikov)

Thanks for the pointer. I know someone who claims to have come up with
such a process 40 years ago.

Bill

[matthew maguire]

Post by Salmon Egg

Post by Angelo Campanella

Post by Salmon Egg
I just recently heard that acoustic excitation has been used to anneal
welds as the are being made. Crudely, I presume that it would be
analogous to using a tamper for compacting concrete.

Look at US patent # 7,344,609 B2 (Stanikov)

Thanks for the pointer. I know someone who claims to have come up with
such a process 40 years ago.
Bill

Perhaps he is thinking of VSR (vibratory stress relief), been alround
for a long time and has some use.

I have not seen the acoustic excitation thing before but after reading
the link from Angelo I think it could work like a tamper (used while
welding) or a VSR (used after welding).

Matt

[Salmon Egg]

Post by matthew maguire
Perhaps he is thinking of VSR (vibratory stress relief), been alround
for a long time and has some use.
I have not seen the acoustic excitation thing before but after reading
the link from Angelo I think it could work like a tamper (used while
welding) or a VSR (used after welding).

When I first heard about it,it made no sense to me, I would expect that
whatever strain would be induced by welding would be very difficult to
remove once the weld cooled down. On the other hand, it would not
surprise me that vibration would affect crystallization while the well
got cooled. I just don't know how.

Bill

[Szczepan]

Post by Salmon Egg

Post by matthew maguire
Perhaps he is thinking of VSR (vibratory stress relief), been alround
for a long time and has some use.
I have not seen the acoustic excitation thing before but after reading
the link from Angelo I think it could work like a tamper (used while
welding) or a VSR (used after welding).

When I first heard about it,it made no sense to me, I would expect that
whatever strain would be induced by welding would be very difficult to
remove once the weld cooled down. On the other hand, it would not
surprise me that vibration would affect crystallization while the well
got cooled. I just don't know how.

The stres relief is normally made with the heat treatment. There are the
diffusion processes. Diffuse the alloy elements and the impurities.
The vibration increase the diffusion.
S*

[Ernie Leimkuhler]

Post by matthew maguire

Post by Salmon Egg

Post by Angelo Campanella

Post by Salmon Egg
I just recently heard that acoustic excitation has been used to anneal
welds as the are being made. Crudely, I presume that it would be
analogous to using a tamper for compacting concrete.

Look at US patent # 7,344,609 B2 (Stanikov)

Thanks for the pointer. I know someone who claims to have come up with
such a process 40 years ago.
Bill

Perhaps he is thinking of VSR (vibratory stress relief), been alround
for a long time and has some use.
I have not seen the acoustic excitation thing before but after reading
the link from Angelo I think it could work like a tamper (used while
welding) or a VSR (used after welding).
Matt

Seems like a similar affect to shot-peening.

[matthew maguire]

Ernie Leimkuhler wrote:
(snip)

Post by Ernie Leimkuhler

Post by matthew maguire
I have not seen the acoustic excitation thing before but after reading
the link from Angelo I think it could work like a tamper (used while
welding) or a VSR (used after welding).
Matt

Seems like a similar affect to shot-peening.

I think so Ernie, but maybe with less stretching of the surface, It also
looked to possibly be used while welding (that would really be different).

VSR works with kinetic energy and the whole mass is in motion. The
reciprocating and oscillating motions over time cause the structure to
yield/compress near the weld to reduce stress risers.

Matt