The effect of the shear flow on directional solidification of SCN-3wt% Salol alloy

• 来源期刊: 中国科学G辑(英文版)
• 年，卷（期）: 2009,（5）
• 页码范围: 742-746
• 页数: 5页
• 语种: 英文
• DOI: 10.1007/s11433-009-0094-1

摘要

The directional solidification process of SCN-3wt% Salol transparent alloy is investigated in the presence of the shear flow at the liquid-solid interface. It is found that the shear flow induces a stabilizing effect on planar interface. At higher pulling rates, oscillation of the growth pattern together with fluctuation of the growth velocity takes place. With the increase of the pulling rate, the interface growth pattern transits from "planar-cellular" oscillation to "cellular-dendritic" oscillation, and the periodicity increases. The modification of the growth pattern is due to the effect of the shear flow on solute distribution, and the time and history dependent character of interface morphology evolution also plays an important role in the formation of the oscillating growth pattern.