|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques II
||Grain Morphology Prediction in AM Simulated Beta-Titanium
||Chris Jasien, Alec Saville, Jonah Klemm-Toole, Kamel Fezzaa, Tao Sun, Amy Clarke
|On-Site Speaker (Planned)
The continued development of metal additive manufacturing (AM) has expanded the metallic alloys for which these processes can be applied. To understand the response of beta-titanium alloys to AM processing, solidification and microstructure evolution needs to be investigated. In particular, thermal gradients (G) and solidification velocities (V) experienced during AM are needed to link processing to microstructure development, including the columnar to equiaxed transition (CET). In-situ synchrotron x-ray radiography of the beta-titanium alloy Ti-10V-2Fe-3Al during simulated laser-powder bed fusion (L-PBF) was performed at the Advanced Photon Source at Argonne National Laboratory, allowing for direct determination of Vs. Since Gs cannot be readily measured, simulation tools were used. The Gs and Vs obtained from computational modeling and experiments are compared to solidification modeling and observed grain morphologies obtained by complementary post-mortem microstructural characterization. These results are then used to develop a solidification map for beta-titanium alloys.
||Additive Manufacturing, Titanium, Solidification