Spacing selection of cellular peritectic coupled growth during directional solidification of Fe-Ni peritectic alloys

摘要

One weakly coupled growth mechanism, cellular peritectic coupled growth (CPCG), was observed recently during the directional solidification of peritectic alloys, which can be a candidate method to produce well aligned in situ composites in peritectic systems. Directional solidification experiments were carried out in Fe-Ni peritectic alloys to investigate the characteristic spacing of CPCG. It was found that the cellular spacing of CPCG first decreases with increasing velocity and then increases with increasing velocity. A simplified model was developed to predict the cellular spacing of CPCG. Good agreement was obtained between the predictions and experimental results in Fe-Ni alloys.