A vague one-sentence question like this will 'go-no-where' [dead silence] with ET members.

Added details and reasons MIGHT elicit a response.

Hint: galling of metals is an element under the general topic of 'tribology'. Start your learning 'there'... so you can refine Your issue/question for 'here'.

Regards, Wil Taylor
o Trust - But Verify!
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation, Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", HBA forum]
o Only fools and charlatans know everything and understand everything." -Anton Chekhov

It doesn't help OP's case that they basically asked this same question 3 months ago: thread330-500028: Galling resistant aluminium alloy grade ?

Stick... dang... You were right.

Soooo Uralsk = troll???

Regards, Wil Taylor
o Trust - But Verify!
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation, Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", HBA forum]
o Only fools and charlatans know everything and understand everything." -Anton Chekhov

I wouldn't say troll, maybe they didn't get the answer they wanted.

Tug, say-what????

Regards, Wil Taylor
o Trust - But Verify!
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation, Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", HBA forum]
o Only fools and charlatans know everything and understand everything." -Anton Chekhov

Yes i didn't get the answer as i wanted

Look into hypereutectic alloys used for pistons and engine cylinder blocks. Alusil is an example. I think we talked about this in the previous thread.

Otherwise, maybe you can sinter aluminum as you would bronze and impregnate with lubricant.

Ur...

Aluminum is inherently soft and prone to gall-unto itself... other alloys not-so-much. Coatings discreetly applied will provide You a solution, for most cases.

As TUG mentioned, it is possible high silicone content casting or forging might be an improvement for wear reduction.

CAUTION: I am pretty certain that aluminum powder CANNOT be successfully 'compacted/sintered' or made using 'additive manufacturing' [layer deposition] to form homogenous/solid aluminum parts. At least NOT at the current state of technology.

Otherwise You are requesting info for an aluminum alloy that does NOT exist... 'unobtanium' per MIL-Y-GBSM.

Regards, Wil Taylor
o Trust - But Verify!
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation, Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", HBA forum]
o Only fools and charlatans know everything and understand everything." -Anton Chekhov

The Al alloys that people are working with in AM these days are very different from the typical wrought materials.
These alloys are being developed for both AM and use in very specific applications.
They will not be 'general use' alloys.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

Ur...

The ONLY unobtanium aluminum Alloys... that may be less prone to galling... Maybe... are not just alloys, they are 'composites'.

Aluminum Metal Matrix composites... which are relatively 'exotic' and usually special order.

See... MIL-HDBK-17-4 COMPOSITE MATERIALS HANDBOOK VOLUME 4. METAL MATRIX COMPOSITES.

Specifically I am pointing to Silicone Carbide [SiC] reinforced/filled wrought [rolled/extruded], cast, or Hot Isostatically Pressed [HIP'ed] raw or basic shapes/parts... embedded into specific aluminum alloys/tempers.

Regards, Wil Taylor
o Trust - But Verify!
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation, Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", HBA forum]
o Only fools and charlatans know everything and understand everything." -Anton Chekhov