In Situ Observation of Growth Process of δ Phase of 0.15% C Carbon Steel during Solidification
In situ observation of growth process of high temperature phase in 0.15% C carbon steel during solidification concerned with using Confocal Scanning Laser Microscope (CSLM), the growth rate of -phase has been measured. The results indicate that high temperature -phase grows at cell crystal way when the cooling speed reaches 2°C/min in 0.15% C carbon steel. The -phase of round or oval cross-sectional shaped may grow stably. The growth rate of -phase is gradually getting slow along with increasing of curvature radius. The variation of growth speed tends to be similar with different solid-liquid interface shapes of -phase. The growth rate of concave solid-liquid interface is faster than that of convex solid-liquid interface for phase. The smaller radius of curvature of phase is, the faster the growth rate reaches.
Jianzhong Wang and Jingang Qi
X. D. Yue et al., "In Situ Observation of Growth Process of δ Phase of 0.15% C Carbon Steel during Solidification", Advanced Materials Research, Vols. 299-300, pp. 341-344, 2011