| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Designing Complex Microstructures through Additive Manufacturing
|
| Presentation Title |
Tailoring local thermal environment for site-specific microstructural control in additively manufactured Ti-6Al-4V via laser powder bed fusion |
| Author(s) |
Sahil Dhiman, Viswanath Chinthapenta, Milan Brandt, Daniel Fabijanic, Wei Xu |
| On-Site Speaker (Planned) |
Sahil Dhiman |
| Abstract Scope |
Laser powder bed fusion (LPBF) additive manufacturing enables the fabrication of intricate metallic parts but often suffers from the lack of precise local microstructure control due to its complex dynamic thermal history. With the adoption of dual sets of LPBF “processing recipes” and its design flexibility, we have demonstrated the capabilities of site-specific microstructure control in Ti-6Al-4V by tuning the local thermal environment spatially and temporally. More specifically, two types of microstructures, α’ martensite (hard domain, influence strength) and lamellar α+β/globular α (soft & tough domain, influence ductility and toughness), are designed to appear in situ as alternate stacked layered bands, longitudinally or radially. The spatial stacking orientation and the band thickness of each microstructure are decisive for the resulting mechanical behaviour. The site-specific microstructure control paves a new way to achieve a synergistic effect on the strength and ductility of multi-phase materials like Ti-6Al-4V produced using LPBF. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Characterization |