|About this Abstract
||Materials Science & Technology 2011
||MS&T'11 Poster Session
||102 Characterisation and Modeling CuCrZr Electrode Degradation during Resistance Spot Welding
||Elise Gauthier, Denis Carron, Philippe Pilvin, Philippe Rogeon, Cédric Pouvreau, Jacky Soigneux, Thomas Lety, François Primaux, Christophe Meuret
|On-Site Speaker (Planned)
Resistance spot welding (RSW) is the main method to assembly auto body. The use of high strength zinc-coated steels in automotive applications leads to the reduction of the electrode life. Even if electrode deterioration is a well-known problem, the understanding and modeling of the complex degradation modes is still limited. Developing a comprehensive thermo-electrical-metallurgical-mechanical model that describes the sequential deterioration is necessary. Microstructural evolution modeling in age hardened CuCr1Zr electrode alloy in welding conditions has been achieved first. Physical properties and constitutive mechanical model, strongly coupled with microstructural phenomena, are then characterized. Finally numerical results obtained by finite element analysis are compared to experimental measurements issued from tests with large quantities of welding spots. A specific attention is paid to the modeling of contact (electrode/sheet and sheet/sheet) and boundary (water cooling) conditions. Using the numerical model, a sensitivity study is made to highlight the main parameters affecting electrode degradation.