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 ...

In this video we'll explore metals, their microstructure, and various techniques like grain boundary strengthening ... that shows us the different phases like ferrite, austenite and cementite ...

In cooling through this zone, ferrite is precipitated on the austenite grain boundaries. As the temperature is reduced, the austenite composition moves towards the eutectoid value, and at 727 C has ...