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SV_BubbleTimetoday at 4:06 AM1 replyview on HN

>It's two times stronger than steel, three times stronger than aluminum, and twice as strong as the same alloy made in a conventional way.

Ugh. The most basic bitch metallurgy discussion possible.

Oh! It’s stronger than aluminum?! So is bronze, we’ve hard that for awhile! Is the new material lighter than aluminum while being stronger? Is it corrosion resistant? Is it machinable? Can you weld it? Does it oxidize? Does it lose all its strength under moderate heat? Does it temper, do you have to temper it? Is it inert? Can it extrude? Can it be formed into billet or just plate/bar? Does it shatter?

Oh but 2x stronger than <some steel> and 3x stronger than <some aluminum>… is that 2024 aluminum? 6061 common, 7075 aero? Is the steel cold roll or 600-series inconel?

This is an area where if you don’t know what you are talking about, STFU, because anything you say is just going to be embarrassing. This is a you don’t know what you don’t know topic.

As to “high entropy metals”, I’ve heard about this for awhile, I would expect it to be stupid low yield, stupid expensive, and hard to use. There is probably some grade-40 titanium ultra alloy that could make the same “strength” claims but no articles about it because it’s “cost prohibitive”.

… I count this as clickbait metallurgy. No thanks.


Replies

KingMobtoday at 4:40 AM

"How dare this Science paper summary designed for mass consumption, not meet my personal standards of metallurgical detail! Don't they know I read them?!"