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 tempering process, martensite precipitates Fe 3 C in an a-iron matrix and the micrographs ... elastic strain than martensite and the carbide phase is more dispersed giving a more ductile ...