Partitioning of alloying elements during the eutectoid transformation of ductile iron

Abstract

The partitioning of the alloying elements plays an important role in the eutectoid phase transformation. Consequently, in order to correctly model the microstructural evolution of ductile iron, the values of the partition coefficients of alloying elements must be known. The partitioning of chromium, manganese, copper, and silicon in ductile iron during the eutectoid transformation was studied using a wavelength dispersive spectrometer (WDS). The data indicate that Cr and Mn show positive segregation while Cu and Si show negative segregation. The partition coefficients of the elements at the growing grain boundaries have been evaluated.

Keywords:

• partitioning
• ductile iron
• eutectoid transformation