|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||Prediction of Strength and Fracture Mode of Heterogeneous Spot Welds Made of AHSS by Finite Elements Simulation
||Damien Fabregue, Thibaut Huin, Sylvain Dancette, Thomas Dupuy
|On-Site Speaker (Planned)
Nowadays, ecological policy encourages carmakers to reduce the global vehicle weight. Fine steel sheets assemblies with different thickness optimizing each part of the assembly are used and steelmakers develop steels which are more and more resistant namely Advanced High Strength Steel (AHSS). During the mechanical tests of heterogeneous AHSS welding, unusual fracture modes (Dome) are observed, in particular along the interface between the Heat Affected Zone (HAZ) and the Fusion Zone or molten zone (FZ). These fractures generally occur with lower strength than expected for these welding.
The objectives of the study are to understand fracture mechanisms during mechanical testing and create a mechanical FE model is developed to be able to predict mechanical strength of the welded assemblies.
This modelling method was successfully applied to a highly heterogeneous spot welding case including a new third generation low density AHSS concept with high aluminum and manganese content.
||Planned: Supplemental Proceedings volume