Unlike the tempered martensitic microstructure formed in conventionally heat-treated steel, LPBF-produced steel develops a high-temperature δ-ferrite phase-based microstructure due to its ...

Changing the carbon content of the alloy changes the microstructure of the pearlite and hence the ... between austenite and ferrite. In cooling through this zone, ferrite is precipitated on the ...

Austenite is a solid and, in general, will be polycrystalline. The formation of ferrite and iron carbide will start at the austenite grain boundaries and the final pearlite microstructure will have ...