Abstract

The analytical correlation between electrochemical corrosion susceptibility and stress residue caused by ultrasonic or other welding techniques for wire micro-joints has been derived. The correlation is based on a physical-chemical model of changes in the electrochemical potentials of crystallographic structure induced by microdefects in the most deformed parts of the wire. The experimental confirmation of the correlation was performed on single crystals and polycrystalline samples of Ni, as well as on 25um Aluminum wire joints. The agreement is significant. The unreliability of a wire joint is considered to be a strong function of the corrosion susceptibility in the joint.

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