当液相过冷至实际结晶温度后，经过一段孕育期，在液相内部开始出现许多有序排列的小原子团，称之为晶胚。当晶胚达到某一临界尺寸后，就成为可以稳定存在并自发长大的晶核，这一过程称为形核。 液相结晶过程中，晶核的形成方式有两种：均匀形核（均质形核或自发形核）和非均匀形核（异质形核或非自发形核）。
n. nucleation
The results indicate that the sites and modes of 8 phase’s nucleation were related to aging temperature.
结果表明,δ相的形核位置和形核方式与时效温度有关。
参考来源 - GH4169合金δ相析出规律及其对高温拉伸性能的影响·2,447,543篇论文数据，部分数据来源于NoteExpress
拍摄了热疲劳裂纹的形核、成长、连接过程。
The nucleation, growth and connection of fatigue cracks were photographed.
阐述了挤压铸造比压对形核率及成长线速度的影响。
Effects of the specific pressure on nucleation rate and linear growth velocity were expounded in squeeze casting.
依靠随机涨落，形成贫碳区，贝氏体铁素体在贫碳的奥氏体中形核。
Carbon-poor area forms by way of random fluctuation and carbon atom diffusion. Bainitic ferrites nucleate in carbon-poor austenite.
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