Diffusion-controlled growth of a solid cylinder into its undercoded melt:Instabilities and pattern formation studied with the phase-field model

1997 ◽  
Vol 55 (3) ◽  
pp. 3087-3091 ◽  
Author(s):  
M. Conti ◽  
F. Marinozzi ◽  
U. Marini Bettolo Marconi
Keyword(s):  
Pattern Formation ◽  
Phase Field ◽  
Field Model ◽  
Phase Field Model ◽  
Controlled Growth ◽  
Solid Cylinder ◽  
Diffusion Controlled

Towards a Phase Field Model of the Microstructural Evolution of Duplex Steel with Experimental Verification

2012 ◽  
Vol 715-716 ◽  
pp. 635-642 ◽  
Author(s):  
S.O. Poulsen ◽  
Peter W. Voorhees ◽  
Erik M. Lauridsen
Keyword(s):  
Microstructural Evolution ◽  
Phase Field ◽  
Field Model ◽  
Phase Field Model ◽  
Dual Phase ◽  
Controlled Systems ◽  
Diffusion Controlled ◽  
Duplex Steel ◽  
Interphase Boundaries ◽  
Multi Phase

A phase field model to study the microstructural evolution of a polycrystalline dual-phase material with conserved phase fraction has been implemented, and 2D simulations have been performed. For 2D simulations, the model predicts the cubic growth well-known for diffusion-controlled systems. Some interphase boundaries are found to show a persistent non-constant curvature, which seems to be a feature of multi-phase materials. Finally, it is briefly outlined how this model is to be applied to investigate microstructural evolution in duplex steel.

MARMOT Phase-Field Model for the U-Si System

2016 ◽  
Author(s):  
Larry Kenneth Aagesen ◽  
Daniel Schwen
Keyword(s):  
Phase Field ◽  
Field Model ◽  
Phase Field Model

scholarly journals Phase-field modeling of grain evolutions in additive manufacturing from nucleation, growth, to coarsening

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Min Yang ◽  
Lu Wang ◽  
Wentao Yan
Keyword(s):  
Additive Manufacturing ◽  
Phase Field ◽  
Field Model ◽  
Three Dimensional ◽  
Phase Field Model ◽  
Nucleation Theory ◽  
Experimental Result ◽  
Classical Nucleation Theory ◽  
Validation Experiment ◽  
Powder Particles

AbstractA three-dimensional phase-field model is developed to simulate grain evolutions during powder-bed-fusion (PBF) additive manufacturing, while the physically-informed temperature profile is implemented from a thermal-fluid flow model. The phase-field model incorporates a nucleation model based on classical nucleation theory, as well as the initial grain structures of powder particles and substrate. The grain evolutions during the three-layer three-track PBF process are comprehensively reproduced, including grain nucleation and growth in molten pools, epitaxial growth from powder particles, substrate and previous tracks, grain re-melting and re-growth in overlapping zones, and grain coarsening in heat-affected zones. A validation experiment has been carried out, showing that the simulation results are consistent with the experimental results in the molten pool and grain morphologies. Furthermore, the grain refinement by adding nanoparticles is preliminarily reproduced and compared against the experimental result in literature.

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