The Effect of Nb Micro-alloying on the Bainitic Phase Transformation Under Strip Casting Conditions
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The effect of Nb concentration on the transformation from austenite to bainitic ferrite has been examined under simulated strip casting conditions. Nb concentration was found to delay the nucleation of bainite, but accelerated its growth. It is suggested that the delay in nucleation increases the driving force for transformation, which results in an increase in the growth rate of the bainite. The bainite/austenite interfaces are proposed to move too quickly to suffer appreciable solute drag.
Dave Gray is warmly thanked for casting the alloys used in this project.
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