The diffusional formation of allotriomorphic ferrite from austenite in Fe-C-X systems. The simplest case: Fe-C-Ni

The diffusional formation of α from γ has been investigated using two complementary approaches. In the first approach, the kinetic transitions in α growth were examined as a function of Ni content using an Fe-1Ni/Fe-5Ni diffusion couple carburized to ∼0.1 (wt.%) C. In agreement with previous investigators, significant α formation was observed in compositions lying above the Local Equilibrium-Partition (LE-P)/Local Equilibrium-Negligible …