围绕振动熵对凝固过程形核动力学的影响进行了讨论，提出了关于体现振动熵影响的凝固形核率的表达式。
The effect of entropy of vibration on the dynamics of forming nucleus of solidification processing was discussed and a expression for the rate of forming nucleus during solidifying was put forward.
极大的冷却速率使得接头组织瞬间形核并快速生长，形成组织细小致密具有快速凝固特征的焊接接头。
Due to very high cooling rate, the nugget structure rapidly nucleates and grows. The refined microstructure of the nugget with rapidly solidified characteristic is formed.
脉冲电流对金属凝固组织的作用机理主要是脉冲电流诱发形核机制。
The mechanism that the solidification microstructure can be refined by pulse current treatment is primary pulse current induced nucleation.
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