Abstract
A potential drop technique which utilizes the electrical circuit used in resistance spot welding is reported. Spot welded samples comprising two steel sheets were inserted between the two Cu electrodes and a constant direct current was supplied between the electrodes. The potential drop between two points, one on each electrode, was determined by analysis for various values of nugget diameter and various values of the contact resistance between the Cu electrodes and the steel sheet sample. The nugget diameter of the spot welded joint could be quantitatively evaluated from the measured potential drop and the equation obtained from the analysis.
| Original language | English |
|---|---|
| Article number | 085602 |
| Journal | Measurement Science and Technology |
| Volume | 26 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2015 Aug 1 |
Keywords
- contact resistance
- nugget diameter
- potential drop technique
- resistance spot welding
- steel sheet