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 |
A Preliminary Study of Microstructural Evolution Modeling for Liquid Metal Droplet Jetting |
Author(s) |
Khushbu Zope, Prahalada Rao, Reza Yavari, Denis Cormier |
On-Site Speaker (Planned) |
Khushbu Zope |
Abstract Scope |
Liquid metal droplet jetting (LMJ) is an emerging metal AM process in which droplets are jetted on demand onto a moving substrate to build up 3D structures. The microstructure and mechanical properties of deposited material are driven by the impact, spreading, cooling and solidification of individual droplets. Parameters such as droplet jetting frequency, drop spacing, and part geometry significantly influence the material's thermal history and hence microstructure. Conventional finite element methods are impractical for modeling LMJ microstructural evolution at the part scale. This study uses a computationally efficient graph theory approach to model spatiotemporal thermal history as a function of printing conditions. The macroscale heat flow calculations are coupled with the cellular automata (CA) method to model grain nucleation and growth within the mushy zone window between the solidus and liquidus temperatures. Predicted microstructures will be compared with actual 4008 aluminum microstructures obtained using a Xerox ElemX machine. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |