About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
|
Symposium
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2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
NOW ON DEMAND: In-situ X-ray and Thermal Imaging of Refractory High Entropy Alloying during Laser Directed Deposition |
Author(s) |
Hui Wang, Benjamin Gould, Michael Moorehead, Marwan Haddad, Adrien Couet, Sarah Wolff |
On-Site Speaker (Planned) |
Adrien Couet |
Abstract Scope |
MoNbTiV high-entropy alloy was in-situ alloyed by laser power-blown directed energy deposition additive manufacturing from a mixture of four elemental powders of Mo, Nb, Ti, and V. This study aimed at providing a fundamental understanding of the alloying process through the in-situ high-speed synchrotron X-ray imaging and infrared camera. High-speed X-ray imaging was applied for investigating the in-situ alloying process through direct observation. The particle delivery velocities of four different elemental powders under the same processing conditions were studied to reveal the performance of different elemental powders during the in-situ alloying process. The velocities of the melt pool flow showed the melt flow dynamics in such a process. The residence time of each elemental powder could be also obtained. With the assistance of an infrared camera, we reported the thermal gradient and cooling rates on the melt pool surface, the change of thermal properties, and melt pool morphology during alloying. |
Proceedings Inclusion? |
Undecided |