Abstract
The purpose of this work is to provide generalized information on the transition resistance properties in spot welding of the aluminium-silicon-coated 22MnB5 steel sheet for varying mechanical and electrical contact loads. As the transition resistance is a prominent influence factor on the magnitude of heat release in the process, it is crucial to have in-depth information on it at hand in order to optimize the mechanical properties of the weld by choosing appropriate process parameters. Based on resistance measurements, a numerical simulation method was employed in order to determine the specific transition resistance as a function of temperature and contact pressure. A mathematical formulation of the results is provided. At the sheet-sheet contact, the specific transition resistance was up to ten times higher than at the electrode-sheet contact. Additionally, it was shown that the local contact temperature is the largest influence factor on the specific transition resistance.
| Original language | English |
|---|---|
| Pages (from-to) | 139-145 |
| Number of pages | 7 |
| Journal | Materials and Design |
| Volume | 106 |
| DOIs | |
| State | Published - 15 Sep 2016 |
| Externally published | Yes |
Keywords
- 22MnB5
- AlSi-coating
- Dynamic resistance
- Electric contact
- Numerical simulation
- Spot welding