熔核是液态金属冷凝后的产物，熔核中央均被加热到金属熔点之上，其边界则是最高温度为熔点的等温面。
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The electrode force signal is regarded as one which can provide maximum information about the quality of nugget.
在点焊过程中压力信号被认为能够提供关于熔核成形最多的信息。
参考来源 - 基于LabVIEW铝合金点焊电流和电极压力监控系统的研究The content of Al_2O_3 fibre in the nugget are increased with the volume fraction of Al_2O_3 fibre in the MMCs.
随着MMCs中纤维体积分数的增加,熔核中纤维的含量也相应增加。
参考来源 - Al·2,447,543篇论文数据，部分数据来源于NoteExpress
试验结果表明，焊点强度满足要求，熔核尺寸符合要求。
The results show the strength and the dimension of spot meet the requirements.
动态电阻曲线频谱图中也同样可以提取出与熔核直径相关的信息。
The correlated information can be picked up in the frequency spectrum charts of dynamic resistance curves.
液相流动促进气泡的碰撞、合并及迁移是气孔沿熔核周边分布的主要原因。
The liquid phase flow promotes the collision, coalescence and movement of bubbles, resulting in that porosities distribute along the periphery of nugget.
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