Vacuum laser powder bed fusion - track consolidation, powder denudation, and future p

[Bob]

https://link.springer.com/article/10.100...20-06071-6

[Junkers]

https://link.springer.com/article/10.100...20-06071-6

Some good insights there. Thanks for sharing. I do wonder how EBM machines navigate those issues. I suspect preheating has a lot to do with it.

[Bob]

Yep, one big downside with EBM is it builds a negative charge in all the powder, so naturally the particles repel each other. The way they get around this is with a rapid scan of the bed at low power effectively sintering the powder together into a single mass with low adhesion, this is why in post processing they have blast the parts similar to media blasting but I believe with just powder stock.