About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
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| Presentation Title |
Thermokinetics Driven Evolution of Microstructures in Laser Additive Manufactured TiAl Alloy |
| Author(s) |
K N Chaithanya Kumar, Madhavan Radhakrishnan, Zane Weldon Hughes, Selvamurugan Palaniappan, Shashank Sharma, Rajarshi Banerjee, Satyam Suwas, Narendra Dahotre |
| On-Site Speaker (Planned) |
K N Chaithanya Kumar |
| Abstract Scope |
Solidification kinetics and thermal history are key to tailoring microstructures in additive manufacturing. This study explores a thermokinetics-based strategy to tailor the microstructure of Ti4822 alloy fabricated using Laser Powder Bed Fusion. Two components with identical processing parameters but different build heights (4 mm and 10 mm) were analyzed. The variation in build volume induced distinct thermal histories, leading to significantly different microstructures. The 4 mm component exhibited fine lamellar γ+α₂ phases, resulting from rapid cooling above the α-transus, while the 10 mm component showed coarsened γ grains and spheroidized α₂ due to slower cooling through the γ+α phase field. A component-scale thermal model explains these variations. The findings, interpreted through solidification and phase transformation phenomena, demonstrate that geometric control of thermokinetics can influence microstructural evolution and mechanical properties. This work offers insights into the process-microstructure-property relationships in TiAl alloys, emphasizing the importance of thermokinetics in additive manufacturing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Titanium, Other |