Abstract
A study has been made of the kinetics of pearlite growth and the partitioning of alloying elements in a eutectoid steel containing nominally 1 wt.% Ni and 1 wt.% Cr. Analytical electron microscopy has been used to study the partitioning of Ni and Cr at the pearlite-austenite interface. Chromium was observed to partition to cementite, while nickel partitioned to ferrite in the temperature range 550–700°C. The behavior of nickel in this alloy differed from that in an FeNiC alloy, where partitioning only occurred at temperatures close to the Ae 1. At higher reaction temperatures, pearlite growth rates calculated on the assumption that interfacial diffusion of chromium was rate controlling, were in good agreement with experiment, although at lower temperatures agreement was less satisfactory. However, overall, it was apparent that chromium had a dominating influence on pearlite morphology, pearlite growth, and partitioning in the NiCr eutectoid steel.
Published Version
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