About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Modelling of Microstructure Evolution in Wire-Based Laser Direct Energy Deposition with Ti-6Al-4V |
Author(s) |
Yousub Lee, Srdjan Simunovic, Brian Gibson, Paritosh Mhatre, Alex Roschli |
On-Site Speaker (Planned) |
Yousub Lee |
Abstract Scope |
Over the past years, large-scale metal additive manufacturing (AM) has been transitioning from rapid prototyping to mass production. However, a wide market penetration of the AM has not happened yet. The difficulties for wide-scale market adoption to critical structural components are related to the development cost for process optimization and for manufacturing of high-quality parts. For metallic components, the process conditions control the material and mechanical properties/performance of the printed part. The thermal history strongly determines the phase fraction, morphology, growth pattern, size of microstructure and nature of defects. In this study, we: 1) developed a thermal simulation using finite element method, 2) experimentally measured thermal histories from a U-shaped part with four tool paths of horizontal, vertical, raster, and contour to calibrate and validate the thermal model, and 3) investigated the effect of thermal history on microstructure evolution and composition and quantified the microstructural variation during the printing process. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |