Effect of alloying elements on the γ to α transformation in steel. I

摘要: Abstract A newly constructed computer program was used to simulate partitionless growth of α in γ Fe-Ni-C alloys, taking into account so-called solute drag by evaluating the dissipation Gibbs energy due diffusion inside interface and nickel spike being pushed front it. It could be shown how conditions at α/γ vary with velocity. continuous change from paraequilibrium quasi-paraconditions illustrated phase diagram. By combination an approximate analytical equation, it possible derive thickness as function time. The velocity assumed start very high values but decreased pile-up carbon. For alloy compositions outside limit for just predicted stop suddenly when critical are approached during reaction. further limit, there no such stop, except action impingement fields Somewhere between lines is a rather rapid drop final α. In order explain experimental information on this one must accept appreciable tendency segregation interface.