Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
674296 | Thermochimica Acta | 2012 | 5 Pages |
Crystallization kinetics of undercooled Fe-B hypereutectic alloy was researched using differential scanning calorimetry (DSC) technique. With the combination of melt-fluxing and high pure argon gas to purify and protect the melts, high undercooling up to 410 K was obtained successfully. The comparison of time dependent transformation fraction at different undercoolings has shown that the crystallization rate increased firstly with increasing ΔT until 354 K and then, the crystallization process was retarded with the further increase of ΔT. Applying quantitative thermodynamic calculation, the evolution of the nucleation and growth rates as a function of temperature was described. On this basis, the temperature–time-transformation (TTT) curve was thus constructed, which gives a reasonable explanation of the observed experimental results.
► Crystallization kinetics of undercooled Fe-B alloy was studied by DSC technique. ► Crystallization rate increased firstly and then was suppressed with increasing ΔT. ► Thermodynamic calculation was adopted to describe nucleation and growth rate. ► Temperature–time-transformation curve was constructed to explain experiment results.