THE lattice parameters of martensite and austenite in steels (carbon content varying from 0.57 to 1.74 per cent) have been extensively studied; but considerable discrepancies exist in the values ...

from partitioning between the ferrite and the austenite adds a substantial amount of energy but the greatest stored energy increase comes from the trapping of carbon in supersaturated ferrite.

The eutectoid phase transition in the iron carbon system takes place at 727 C. The three components in equilibrium at this temperature are Austenite, g, with the composition Fe - 0.77 wt % C, Ferrite, ...

(a) Small austenite grain size leading to plates of ferrite growing in parallel formations. (b) Large austenite grain size with plates of ferrite nucleating intragranularly on non-metallic inclusions ...

Between 35 and 140 C/s the system at room temperature is a mixture of these two materials. The microstructure of martensite in austenite is shown in the micrograph. The black grains are the ...

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