About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing of Metals: Applications of Solidification Fundamentals
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Presentation Title |
Estimation of Transient Melt-pool Temperature Distributions Using In-situ X-ray Radiography Images |
Author(s) |
Rakesh R. Kamath, Sudarsanam Suresh Babu, Hahn Choo |
On-Site Speaker (Planned) |
Rakesh R. Kamath |
Abstract Scope |
Understanding the transient evolution of thermal gradient at (G) and velocity (R) of the liquid-solid and vapor-liquid interfaces is key to obtain desired microstructures in additive manufacturing. In-situ dynamic x-ray radiography has been leveraged in recent years to probe the transient evolution of R with high spatial and temporal resolution. However, the current methods used to measure G are either incapable of sub-melt-pool surface measurement (thermography) or have lower spatial/temporal resolution (x-ray diffraction). In this study, we overcome the above shortcomings by successfully demonstrating a novel approach to estimate the transient, sub-surface temperature distributions from x-ray radiographs of laser melting (spot and raster) events in Ti-6Al-4V alloy. This workflow can be applied to the wealth of existing radiography data to correlate the local solidification microstructure to transient G and R and further aid the validation and improvement of melt-pool simulations.
*Supported by MURI and AUSMURI Collaborative Research. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, Titanium |