your explanation is actually backwards, metals are counter intuitive at the molecular scale
Forging does not align the molecules, it actually mixes them up, and removes carbon.
Cast iron is brittle for 2 reasons.
when cooling from molten the molecules are able to align into large crystals, and where these crystals meet is a boundary where cracks can start and easily propogate.
And carbon in the mix makes it much more difficult for the molecules to “slip” past each other.
your explanation is actually backwards, metals are counter intuitive at the molecular scale
Forging does not align the molecules, it actually mixes them up, and removes carbon.
Cast iron is brittle for 2 reasons. when cooling from molten the molecules are able to align into large crystals, and where these crystals meet is a boundary where cracks can start and easily propogate. And carbon in the mix makes it much more difficult for the molecules to “slip” past each other.