About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
In-Situ Monitoring and Control of Solidification & Deformation Processes in Metal Additive Manufacturing
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| Presentation Title |
Tailoring Microstructure and Mechanical Properties During Additive Manufacturing of Ti-6Al-4V via In-Process Laser Heat Treatments |
| Author(s) |
Kouider Abdellah Abdesselam, Steve Gaudez, Steven Van Petegem, Veijo Honkimäki, Simon Hallais, Louis Cornet, Maxime Vallet, Manas V. Upadhyay |
| On-Site Speaker (Planned) |
Manas V. Upadhyay |
| Abstract Scope |
In-process laser-based heat treatments (LHTs) during additive manufacturing offer a promising alternative to post-process annealing for tailoring the microstructure and mechanical properties of Ti-6Al-4V. This study investigates the effect of LHTs applied during laser-based directed energy deposition. Three samples were fabricated at 300 W: one as-built reference and two with LHTs applied after each deposited layer using 100 W (LHT100) and 300 W (LHT300) without powder addition. LHT100 improved the strength/ductility trade-off, while LHT300 significantly enhanced ductility and toughness but reduced strength. Synchrotron XRD analysis showed negligible differences in overall β (bcc) and hcp phase fractions across samples. However, SEM analysis revealed notable variations in the relative fractions of different hcp phases (martensitic, diffusively formed, and massively transformed), explaining the mechanical property differences. These results highlight the effectiveness of in-process LHTs in tuning microstructure and performance, providing an alternative path to optimizing properties in additively manufactured Ti-6Al-4V components. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Process Technology, Mechanical Properties, Phase Transformations |