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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Pixner, Florian
Austrian Institute of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2024Thermal cycling effects on the local microstructure and mechanical properties in wire-based directed energy deposition of nickel-based superalloycitations
- 2024Physical Simulation of microstructures generated by wire-arc directed energy deposition
- 2024Welding of S1100 Ultra high-Strength Steel Plates with Matching Metal-Cored Filler Wirecitations
- 2023Influence of process and heat input on the microstructure and mechanical properties in wire arc additive manufacturing of hot work tool steelscitations
- 2023Application of electron beam welding technique for joining coarse-grained and ultrafine-grained plates from Al-Mg-Si alloycitations
- 2023Microstructure and texture characterisation of friction stir welded CoCrNi and CoCrFeMnNi multi-principle element alloyscitations
- 2023Microstructure characterisation of multi-principal element alloys welds produced by electron beam weldingcitations
- 2022Combination of Electron Beam Surface Structuring and Plasma Electrolytic Oxidation for Advanced Surface Modification of Ti6Al4V Alloycitations
- 2022Directed energy deposition processes and process design by artificial intelligencecitations
- 2022Tailoring the alloy composition for wire arc additive manufacturing utilizing metal-cored wires in the cold metal transfer processcitations
- 2022Mechanical and microstructural properties of S1100 UHSS welds obtained by EBW and MAG weldingcitations
- 2022Manufacturing of coarse and ultrafine-grained aluminum matrix composites reinforced with Al2O3 nanoparticles via friction stir processingcitations
- 2022Wire-based electron beam additive manufacturing of tungstencitations
- 2021Residual Stresses, Microstructure, and Mechanical Properties of Electron Beam Welded Thick S1100 Steelcitations
- 2020Wire-Based Additive Manufacturing of Ti-6Al-4V Using Electron Beam Techniquecitations
- 2019Influence of the focus wobbling technique on the integrity and the properties of electron beam welded MarBN steelcitations
- 2019Improving the integrity and the microstructural features of electron beam welds of a creep-resistant martensitic steel by local (de-)alloyingcitations
- 2019Microstructure development of molybdenum during rotary friction weldingcitations
- 20194-D Printing of NiTi Shape Memory Alloys
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article
Microstructure development of molybdenum during rotary friction welding
Abstract
<p>Rotary friction welding is a solid state welding process where the required heat for welding is generated by friction caused by the relative movement between a stationary part and its rotary counterpart. As the melting temperature is not reached, this welding technique does not produce typical welding defects known from fusion welding. In the case of molybdenum, grain coarsening and re-distribution of impurities on grain boundaries are the main problems during fusion welding that can partly be avoided by rotary friction welding. Pure molybdenum and the precipitation strengthened alloy TZM (titanium-zirconium-molybdenum) were subjected to rotary friction welding and a systematic parameter optimization led to successful welds. However, Mo and TZM proved to be very sensitive to small process parameter changes. Microstructural analysis shows a transition from elongated grains with intense substructure in the base material to nearly equiaxed grains at the weld interface is observed. Typical macroscopic zones in the joint can be distinguished and are investigated by electron backscatter diffraction (EBSD). Inverse pole figures maps, grain reference average misorientation maps and resulting grain sizes as well as orientation distribution functions (ODF) are considered to investigate the deformation state of the different zones. Continuous dynamic recrystallization and the competing dynamic recovery were observed as key mechanisms; Intensive subgrain formation and the onset of recrystallization played the major role on the microstructure modification due to rotary friction welding. Grain refinement is observed in the weld interface for the TZM, while coarse grains are observed in the same zone for the pure Mo but comparable crystallographic texture is observed for both materials.</p>