交流电脉冲对过共晶Al-Si合金中初生Si相偏析的作用机制

张利民, 李宁, 朱龙飞, 殷鹏飞, 王建元, 吴宏景

Macrosegregation Mechanism of Primary Silicon Phase in Cast Hypereutectic Al-Si Alloys Under Alternating Electropulsing

ZHANG Limin, LI Ning, ZHU Longfei, YIN Pengfei, WANG Jianyuan, WU Hongjing

图8 电脉冲下初生Si梯度偏析形成的物理模型

Fig.8 Formation model of gradient macro segregation of primary Si phase under electropulsing (F, Fy —electromagnetic repulsive force and its component in y-direction; v —velocity; vx, vy —velocity in x- or y-direction, respectively) (a) the first segregation layer (b) the second segregation layer (c) the third segregation layer (d) near eutectic structure