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Old 03-05-2019, 12:13 AM
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Paychk Paychk is offline
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Default weld metal & glass together?

What will they come up with next?


https://phys.org/news/2019-03-welding-breakthrough.html
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Old 03-05-2019, 04:42 AM
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Great, nowthey are goingto weld the windows in cars creating yet a new industry and expense.
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Old 03-05-2019, 08:14 AM
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Quote:
The process relies on the incredibly short pulses from the laser. These pulses last only a few picoseconds—a picosecond to a second is like a second compared to 30,000 years.
Now that's pretty quick, huh?
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Old 03-05-2019, 09:32 AM
Lew Hartswick Lew Hartswick is offline
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BS. And after it's welded and the temperature changes a few degrees then what? :-(
..lew..
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Old 03-05-2019, 10:58 AM
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Quote:
Originally Posted by Lew Hartswick View Post
BS. And after it's welded and the temperature changes a few degrees then what? :-(
..lew..
Well, they claim this:
Quote:
"We tested the welds at -50C to 90C and the welds remained intact, so we know they are robust enough to cope with extreme conditions."
I tend to distrust this, as it would depend on how the metal was formed adjacent to the weld. It there was a lip that would allow bending due to expansion differences, that claim would be valid.
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Old 03-05-2019, 07:36 PM
Steeveedee Steeveedee is offline
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Quote:
Originally Posted by Ironman View Post
Well, they claim this:


I tend to distrust this, as it would depend on how the metal was formed adjacent to the weld. It there was a lip that would allow bending due to expansion differences, that claim would be valid.
Yes, an expansion joint would allow the materials to "live" together over a range of temperatures. Temperature control is highly developed on modern spacecraft, and the temperature range mentioned is easily maintained. It won't be used in the automotive sector anytime soon, I expect. That kind of welding is going to be kilobucks+ to the inch. But I can easily see where some sensors would benefit from not having any sealants, as they eventually break down in hostile places like space. All the weld needs to do is keep the parts in the right places, so it might only require a few tack welds, or even welding along one edge only.
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Old 03-05-2019, 10:12 PM
threepiece threepiece is offline
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It would seem as the act of welding glass to metal is not new.

A quote from the article:

"Heriot-Watt, said: "Traditionally it has been very difficult to weld together dissimilar materials like glass and metal due to their different thermal properties"

I wonder how it was done before this process?
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Old 03-16-2019, 06:21 PM
o7oBaseMetal o7oBaseMetal is offline
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I would question the legitimacy of the term "welding" but I know A.O. Smith already developed a process for glass lining metal tanks like hot water heaters decades ago. I think one could make the argument that Solar Flux is a similar concept as well.

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