About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing of Metals: Applications of Solidification Fundamentals
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Presentation Title |
Modeling Microstructural Evolution during Laser Processing of Metallic Powders using a Hybrid Mesoscale-Continuum Approach |
Author(s) |
Ching Chen, Sergey Galitskiy, Dmitry S. Ivanov, Ranadip Acharya, Vijay Jagdale, Avinash M. Dongare |
On-Site Speaker (Planned) |
Ching Chen |
Abstract Scope |
Laser melting is an emerging technique of additive manufacturing that enables the fabrication of complex products. The interactions of metallic powders with lasers can lead to evaporation (ablation), melting, and subsequent solidification. Understanding the microstructure evolution during this process requires capabilities to model laser energy absorption/dissipation of the powders with length scales of microns. This talk presents a hybrid mesoscale-continuum approach that combines quasi-coarse-grained-dynamics (QCGD) method with two-temperature model (TTM) to study melting and solidification behaviors of metal powders during laser processing at experimental scales. The QCGD/TTM method retains laser energy absorption, melting, and microstructure (defect) evolution behaviors, as predicted using an atomistic-continuum approach combining molecular dynamics (MD) with TTM. The QCGD/TTM simulations are validated by reproducing the MD/TTM predicted melting and ablation behavior of metal powders at nanoscales. The applicability of QCGD/TTM simulations to model laser-induced melting and solidification behavior of Ti powders at experimental scales will be presented. |
Proceedings Inclusion? |
Planned: |
Keywords |
Titanium, Solidification, Modeling and Simulation |