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Materion sells 4 types of amorphous metal alloys,it cost huge amount of money,1000 dollar per kilogram.My question is,why would anybody choose it over lets say titanium 6al-4v?

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  • $\begingroup$ Very generally: engineering is all about tradeoffs. Higher properties often cost more money. $\endgroup$ – wwarriner Oct 18 '16 at 12:17
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I assume you're talking about their bulk metallic glass (BMG), aka amorphous glass forming alloys.

To quote their site:

HIGH PERFORMANCE ALTERNATIVE TO TITANIUM

BMGs have strength-to-weight ratios more than twice those of titanium, magnesium and aluminum alloys. Amorphous alloys typically have elastic limits that can be three times higher than crystalline metallic alloys and exhibit outstanding corrosion resistance due to their unique atomic structure and composition.

EASY TO FABRICATE

These amorphous alloys have the additional benefit of near net shape fabrication by injection molding and by a thermoplastic forming process, similar to plastics.

Whether or not that's worth the extra cost depends on your circumstance.

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