Abstract
The effects of second phase particles, e.g. M 23C 6, MC and M(C, N) carbides on the grain growth phenomenon of FeNiCr alloys have been determined. Various theoretical models on grain coarsening have been compared. The grain size at all stages of grain coarsening was dependent on the undissolved carbide particle size ( r), the volume fraction ( f), and the nature of the carbides. The nature of M 23C 6 carbides varied, since Fe, Ni and Mo entered the M 23C 6 unit cell; and complex carbides such as (Cr 15Fe 4Ni 2Mo 2)C 6 were formed. Gladman's equation was verified for predicting the observed grain size values to a significant degree, and other models were less successful.
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