About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Materials Design and Alloy Development IV: Rapid Development
|
Presentation Title |
Tailored Microstructures in a Laser-processed Metastable Beta-Ti Alloy Using Enforced Epitaxial Growth |
Author(s) |
Wenhao Lin, Ji Ma |
On-Site Speaker (Planned) |
Wenhao Lin |
Abstract Scope |
Laser additive manufacturing demonstrates the capability of controlling microstructure via altering the process parameters. In this study, metastable Ti-25Nb(at.%) samples are processed using laser powder bed fusion (LPBF) showing a “ladder-like” microstructure with high density of melt pool boundaries that align with the building direction and cellular solidification boundaries perpendicular to the melt pool boundaries. The epitaxial growth is locally enforced due to the small hatch distance such that only parallel cellular structures develop due to high G/R ratio are maintained, while the rest are erased from remelting. The result is a microstructural composite formed with melt pool boundaries and cellular structures that alters the mechanical properties and anisotropy of the part. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Titanium, Solidification |