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The project CASSTIR, funded by the Belgian Science Policy, is a collaboration between BWI, UCL, CEWAC and UGent. The project aimed at stimulating and introducing the innovative friction stir welding technique applied to aluminium alloys in Belgium, as well as obtaining a profound knowledge in this welding process by studying the friction stir joint characteristics into great detail.
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BWI, VIVES, TUM, SLV-MC and SLV-BB are executing a research project on the weldability of additively manufactured and conventional components.
The following themes are investigated:
- Which processes can be used to connect metal-printed parts to conventionally manufactured pieces?
- Guidelines for the optimal combination of conventional techniques and AM techniques.
- What are the consequences of the applied welding process for the (mechanical) properties of the parts and for the connection itself?
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The CORONA project focuses on the corrosion resistance of stainless steel after post-treatment after welding.
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The fatigue properties of welded components can be improved by means of post-weld treatments, like TIG dressing or hammering. This article describes the results obtained in the research project “DURIMPROVE”, in which the effects of post-weld treatments on welds in high strength steel were investigated.
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The aim of the project is to generate all the necessary knowledge to develop a standard for this welding process, such as information on weldable materials, material combinations and dimensions, design of welded joints, recommendations regarding the minimum tests to be carried out, suitable welding parameters and welding windows, quality requirements and acceptance criteria, and this for a wide range of materials.
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This project developed techniques for improving the performance of welded, high-strength steels (yield strengths of 700 and 960 MPa) at thicknesses of 5-20 mm, for use in fatigue-loaded, welded structures, e.g., construction equipment, transportation vehicles and lifting devices. High frequency impact peening, weld toe laser dressing and low transformation temperature filler material were examined. Experimental and analytical procedures assessed the benefits and limitations of the selected methods. Full-scale testing demonstrated industrial viability and cost benefits. Practical implementation guidelines and design recommendations were disseminated.
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