About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Process-induced Microstructures and Defects
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Presentation Title |
Understanding the Geometry-dependent Microstructure in Complex Ti-6Al-4V Parts Fabricated by Laser Powder Bed Fusion |
Author(s) |
Chengshang Zhou, Pei Sun, Tristan Amstrong, Noah Garcia, Zak Fang |
On-Site Speaker (Planned) |
Chengshang Zhou |
Abstract Scope |
Laser Powder Bed Fusion is a unique technology that enables the manufacturing of geometrically complex Ti-6Al-4V parts. The microstructure in LPBFed Ti64 is determined by the LPBF process parameters including laser power, scan speed, and thermal cycles. Understanding the microstructure in specific locations at complex geometries is of great importance in predicting the mechanical properties of the Ti-6Al-4V parts. This work investigates the effects of orientation, down-skin strategy, up-skin strategy, and geometric features on the localized microstructure. The representative microstructure of the LPBF Ti-6Al-4V impeller part is characterized, showing the effect of heating over the previous layer scan. The effect of heat treatment on the microstructural evolution of LPBF Ti-6Al-4V is studied. In addition, process parameters and strategies to achieve columnar-to-equiaxed transition (CET) in as-built Ti-6Al-4V alloy are discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Titanium, Mechanical Properties |