WELDO: Welded structures with significantly increased fatigue life via new Digitalized Optimization

Important results from the project

The project delivered the planned results and met the objectives from the start. We improved the fatigue properties of welded joints by optimizing alloying strategies for high-strength steels and developed an innovative method to get there. The project will lead to follow-up projects. Results have been disseminated through meetings and conferences. The collaboration worked as expected and contributed to the success of the project.

Expected long term effects

• Through improved fatigue properties of welded joints, the results contribute to increased durability in structures using high-strength steels. • The method can be applied to the evaluation of acceptable levels of residual elements in recycled steel. • The new insights can drive innovation and increase competitiveness for companies using high-strength steels in their products. • The results are a basis for future R&D projects for companies developing base materials and welding consumables.

Approach and implementation

The project was completed on schedule and the selected activities were appropriate to achieve the objectives. We performed statistical analysis, Thermo-Calc simulations, CFD simulations, laboratory production with small-scale casting and welding trials. The project developed as planned. The cooperation between the project partners worked as expected and contributed to the success of the project. Some unexpected challenges arose, but these were overcome through careful planning and cooperation.