我们发现在断开探头和电极之间的接触后，锡和铝的混合物或合金在接触面和探头或铝电极上形成了。
It was found that the mixture or alloy of tin and aluminum is generated in the contact area and remains on both the probe and the aluminum electrode after breaking the contact.
通过数值模拟发现，电极压力和电极球面半径是影响电极-工件间接触面大小的主要因素；
The electrode-to-workpiece and workpiece-to-workpiece con tact behaviors are analyzed, and reasons for contact pressure distribution are explained.
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