Acoustic annealing?

Salmon Egg

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Dec 28, 2008, 12:31:20 PM12/28/08

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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.

--
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Angelo Campanella

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Dec 28, 2008, 5:50:55 PM12/28/08

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Salmon Egg wrote:
> 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

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Dec 29, 2008, 11:32:40 AM12/29/08

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In article <jpT5l.100344$_Y1.9...@bgtnsc05-news.ops.worldnet.att.net>,
Angelo Campanella <a.camp...@att.net> wrote:

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

Bill

matthew maguire

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Dec 30, 2008, 8:35:21 PM12/30/08

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Salmon Egg wrote:
> In article <jpT5l.100344$_Y1.9...@bgtnsc05-news.ops.worldnet.att.net>,
> Angelo Campanella <a.camp...@att.net> wrote:
>
>> Salmon Egg wrote:
>>> 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

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Dec 30, 2008, 10:03:10 PM12/30/08

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In article <gjei8r$deo$1...@news.motzarella.org>,
matthew maguire <matt...@comcast.net> wrote:

> 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.

Ernie Leimkuhler

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Dec 31, 2008, 3:17:52 AM12/31/08

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In article <gjei8r$deo$1...@news.motzarella.org>, matthew maguire
<matt...@comcast.net> wrote:

Seems like a similar affect to shot-peening.

matthew maguire

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Dec 31, 2008, 7:07:42 AM12/31/08

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Ernie Leimkuhler wrote:
>
(snip)

>>
>> 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

Szczepan

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Sep 28, 2009, 4:19:22 AM9/28/09

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"Salmon Egg" <Salm...@sbcglobal.net> wrote
news:SalmonEgg-187F1...@news.la.sbcglobal.net...

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*