Description
Within Additive Manufacturing (AM), wire-arc Directed Energy Deposition (waDED), using an electric arc, a metal wire is melted and deposited selectively layer-by-layer, resulting in a 3D object. With increased deposition rates and less safety risks, waDED, is a possible addition to production chains. Despite intensive development process-intrinsic defects, increased porosity compromises the lifespan of parts hindering its adoption. When applied to expensive materials like titanium alloys, the economic and environmental benefits are noticeable, so decreasing failure by process-intrinsic defects is key. Solutions to these defects are mainly process orientated and often cannot fully resolve these defects. An alternative material-based approach is tested in this study, aiming to influence the dominant deformation mechanism, and improving processability of β-Ti alloys, which are characterized by the coarsened microstructure and decreased mechanical performance. Based on the method proposed by Morinaga et al. [1], compositions of alloys are adjusted to achieve TWinning-Induced-Plasticity (TWIP) and TRansformation-Induced-Plasticity (TRIP), which induce hardening and ductility while under stress thus mitigating the influence of defects. Thermodynamic simulations and alloy design methods are used to adapt the compositions, which are then small-scale-cast and tested using the dilatometer. These samples are then characterized using, scanning electron microscopy (SE/EBSD), XRD and micro-hardness measurements. In parallel, commercially available β-Ti alloys will be manipulated and processed via waDED, such as Ti-15333, where the effects of the thermal cycling deformation mechanisms will be assessed. An alternative approach to mitigate defects is shown to be relevant and potentially transferable to alternative AM processes.| Period | 6 Sept 2024 |
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| Event title | Alloys for Additive Manufacturing Sympsium |
| Event type | Conference |
| Location | ParisShow on map |
| Degree of Recognition | International |
Research Field
- Wire-Based Additive Manufacturing