Three-dimensional Dendritic Needle Network model with application to Al-Cu directional solidification experiments [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 2015.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- Article numbers 012,082 : digital, PDF file
- Additional Creators:
- Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- We present a three-dimensional (3D) extension of a previously proposed multi-scale Dendritic Needle Network (DNN) approach for the growth of complex dendritic microstructures. Using a new formulation of the DNN dynamics equations for dendritic paraboloid-branches of a given thickness, one can directly extend the DNN approach to 3D modeling. We validate this new formulation against known scaling laws and analytical solutions that describe the early transient and steady-state growth regimes, respectively. Finally, we compare the predictions of the model to in situ X-ray imaging of Al-Cu alloy solidification experiments. The comparison shows a very good quantitative agreement between 3D simulations and thin sample experiments. It also highlights the importance of full 3D modeling to accurately predict the primary dendrite arm spacing that is significantly over-estimated by 2D simulations.
- Report Numbers:
- E 1.99:la-ur--14-28896
- Other Subject(s):
- Published through SciTech Connect.
IOP Conference Series. Materials Science and Engineering 84 ISSN 1757-8981 AM
Modeling of Casting, Welding and Advanced Solidification Processes (MCWASP XIV), June 21-26, 2015; Awaji island, Hyogo, Japan.
Tourret, D.; Karma, A.; Clarke, A.; Gibbs, P.; Imhoff, S.
- Funding Information:
View MARC record | catkey: 24073416