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Consider isothermal transformation from austenite to ferrite in F e - 0 . 2 w t % C after rapid quenching from 1 0 0
Consider isothermal transformation from austenite to ferrite in after
rapid quenching from to What is the ferrite fraction after a holding
time of minutes? Assume nucleation site saturation and the formation of a ferrite
film at prior austenite grain boundaries. The austenite grain size is A cubic
grain shape and a linearized phase diagram can be adopted for simplicity.
Construct the phase diagram using the following values: Austeniteferrite
transformation temperature in pure is the eutectoid temperature is
the eutectoid composition is and the carbon concentration in ferrite at the
eutectoid temperature is The diffusion coefficient of can be described
with a preexponential term of and an activation energy of
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