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Metallurgy and Compounding


Tiberius Gracchus

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So, as we have seen with Rashek and Miles Hundred-lives, compounding is possible when a allomancer burns a feruchemical metalmind that they have the necessary identity to access. So far everyone we have seen was allomantically and feruchemically able in the same metal or all the metals. Since all of the Metallic Arts metals come in pairs of one element and one alloy containing that element, and metalminds are (in a non-magical sense) identical to uninvested chunks of the same metal, it is theoretically possible for a metalmind to be filled and then forged into it's paired metal. My question is if this metal were then allomantically burned by the same feruchemist that filled it prior to forging, would that allow feruchemical investiture to be accessed and with which power? 

As an example Wax Ladrian fills an ironmind with a significant amount of weight, he then takes the ironmind to a forge and has it forged into steel, he files the steel down and burns it. Would he have access to a compounded version of F-iron, or less likely F-steel?

Tib

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Neagor

What would happen if a Feruchemist fills, for example, a tin metalmind then mixes it to make a pewter metalmind? Does the stored attribute change? Is the Investiture gone when you melt the metal? What if he just makes it into a tin metalmind again?

Brandon Sanderson

If you make it impure, you'll keep the investiture, but won't be able to get it out. If you make it back into the same thing, you'll be fine, and can access it normally. If you try to fill it, after changing the composition to make another viable metal, it will act a little like a computer hard drive with corrupted sectors. Some of it will work for the new investiture, but you won't be able to fill it nearly as full. (Depending on how full it was before you melted down.)

This holds for basic uses of the metallurgic arts. Once you start playing with some of the more advanced parts of the magic, you can achieve different results, which are currently RAFO.

eSPiaLx

Similarly, if you were to soulcast a metal would it have similar effects of corrupting the investiture and making it inaccessible? Like if you turned a steel metalmind into pewter.

Brandon Sanderson

I've stayed away from soulcasting and forging in these types of discussions, as I feel my answers will dig too deeply and prompt more questions that, eventually, will lead to lots of RAFO type questions. I don't really want to go there--but I will say this. Changing invested objects with other magics is hard, and often requires such a force of investiture yourself, that it becomes very power-inefficient. Just like we can technically turn lead into gold right now--by spending way more money than the gold is worth.

BipedSnowman

So you could, for example, use electrolysis to dissolve a metalmind in water, then reverse the reaction later to get the investiture?

OR, better question, if you store investiture in one allotrope of iron, can your retrieve it off you change to a different allotrope?

Brandon Sanderson

I see no reason why these wouldn't work.

dce42

So would forging with the blood of a radiant(kaladin, dalinar,etc) work on a shard blade from a fallen radiant to say change who they had bonded, or how the bond was broken (to say death instead of giving up on the oath)?

Brandon Sanderson

RAFO.

General Reddit 2016 (Nov. 11, 2016)

 

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I think he'd get the stored weight back out, not that it'd be turned into stored speed.  I don't think that the stored attribute is going to change when the metal is alloyed.  

He would still not be able to compound though:

  1. If it produces weight, he wouldn't be able to store the weight in the steel, because it's the wrong metal.  
  2. If it's converted to speed, he wouldn't be able to store the speed, because he's not a Steelrunner.  

To be able to successfully compound, you need to be able to both store and burn using the same metal.  

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One thing I'd like to mention is that if Identity is the only obstructing factor to an Allomancer burning a metalmind of their allomantic metal...

Unkeyed metalminds are free compounding sources. If your steelrunner buddy can get an F-Aluminum spike, he can give you speed to compound for a sudden boost. Vaguely reminds me of nicrosil allomancy tbh.

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21 minutes ago, Halyo_Alex said:

Unkeyed metalminds are free compounding sources. If your steelrunner buddy can get an F-Aluminum spike, he can give you speed to compound for a sudden boost. Vaguely reminds me of nicrosil allomancy tbh.

No need to spike just use a medallion.

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