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BWI and VIVES have started 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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Selecting, simulating and optimising mechanical joining in a multi-material context set high requirements in relation to current material tests. Currently, no guidelines are available with regard to material characterisation for the support of the design of mechanical joining to achieve hybrid components. One of the objectives of this project is to standardise this. Which material tests must be performed for the characterisation of mechanical joining of dissimilar materials will be determined? An investigation will be performed within this context regarding how existing testing methods must be changed based on the new requirements.
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Investigation of new welding technology for aluminium
The Belgian welding Institute has started a research project about a new spot weld technique; friction spot welding. The connection is created by using friction. This welding technology is particularly suitable for welding aluminium, and provides a solution to the difficulties that resistance spot welding is facing when joining aluminium, such as the electrode wear and tool life.
