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| Naji, M. |
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| Motta, Antonella |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Petrov, R. H. | Madrid |
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Haslberger, Phillip
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Topics
Publications (4/4 displayed)
- 2018Precipitates in microalloyed ultra-high strength weld metal studied by atom probe tomographycitations
- 2018Microstructure and mechanical properties of high-strength steel welding consumables with a minimum yield strength of 1100 MPacitations
- 2016Development of the strongest welding consumables
- 2015Boron grain boundary segregation in a heat treatable steelcitations
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article
Microstructure and mechanical properties of high-strength steel welding consumables with a minimum yield strength of 1100 MPa
Abstract
Welded high-strength steel components have great potential for use in lightweight constructions or highly loaded structures. Welding of steels with a yield strength of more than 1100 MPa is particularly challenging because of the toughness requirements for the weld metal. Currently, a new generation of welding consumables with a minimum yield strength of 1100 MPa has been developed. Based on electron backscatter diffraction and atom probe tomography, a concept for toughening and strengthening of all-weld metal samples was deployed. Starting from a martensitic all-weld metal sample with an approximate yield strength of 1000 MPa, a reduction in manganese and silicon content resulted in a refined microstructure with a lower prior austenite grain size and effective grain size. Furthermore, a higher average grain boundary misorientation was measured, which influences the toughness positively. An addition of vanadium caused the formation of vanadium-rich clusters, which increased the strength of the all-weld metal significantly. With a combination of these two mechanisms, it was possible to produce an all-weld metal sample with the required yield strength of more than 1100 MPa and an acceptable toughness.