Questions tagged [cold-welding]

Questions about the phenomenon of cold welding that happens with metals in the vacuum of space.

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Were there ever any accidents involving cold-welding on EVA?

I recall there were cases of mechanisms of spacecraft that failed due to cold-welding, but are there any records of accidental cold-welding on EVA? of e.g. an ill-prepared tool cold-welding to a part ...
3
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1answer
404 views

What is the air pressure threshold for cold welding?

Cold welding is a problem in vacuum of space - where two metal parts come into contact, they may weld accidentally to each other. As I understand, even a little air or other substance prevents it. My ...
7
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1answer
430 views

How much of a mixed blessing is cold welding?

I know it's hard to quantify, but are rocket designers and astronauts more happy about the possibility of cold welding, or more negative about it? I mean: two "bare metal" surfaces in vacuum weld ...
12
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1answer
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Can you print 3D with iron in space?

A couple of recent questions; How is the unwanted cold welding prevented in space? & Would unpainted iron or steel rust in space? indicate that some pure metals like iron that have been forged in ...
27
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1answer
21k views

How is the unwanted cold welding prevented in space?

Metallic surfaces touching in the vacuum can stick to each other and fuse. This is known as the "cold welding" and it seems to be a possible issue in space if it happens where it should not. It was ...