Multiphase Phase-Field Approach for Virtual Melting: A Brief Review

2021 ◽  
Vol 18 (2) ◽  
pp. 102-107
Author(s):  
Arunabha Mohan Roy
Keyword(s):  
Phase Transformations ◽  
Phase Field ◽  
Field Model ◽  
Solid Phase ◽  
Scale Effects ◽  
Phase Field Model ◽  
Short Review ◽  
Nanoscale Material ◽  
Material Parameters ◽  
Field Approach

A short review on a thermodynamically consistent multiphase phase-field approach for virtual melting has been presented. The important outcomes of solid-solid phase transformations via intermediate melt have been discussed for HMX crystal. It is found out that two nanoscale material parameters and solid-melt barrier term in the phase-field model significantly affect the mechanism of PTs, induces nontrivial scale effects, and changes PTs behaviors at the nanoscale during virtual melting.

A Phase Field Approach for Modeling Melting and Re-Solidification of Ti-6Al-4V during Selective Laser Melting

2016 ◽  
Vol 704 ◽  
pp. 241-250 ◽  
Author(s):  
Peter Holfelder ◽  
Jin Ming Lu ◽  
Christian Krempaszky ◽  
Ewald A. Werner
Keyword(s):  
Selective Laser Melting ◽  
Phase Field ◽  
Field Model ◽  
Phase Field Model ◽  
Nucleation And Growth ◽  
Laser Melting ◽  
Laser Material ◽  
Field Approach ◽  
Multi Phase ◽  
Material Interaction

A Multi Phase Field model is proposed to describe the microstructure evolution induced by laser-material interaction in Selective Laser Melting (SLM). On the basis of the free enthalpy, the nucleation and growth processes occurring during the relevant phase transformations are explicitly taken into account. Within this contribution, the focus is laid on the SLM processing of the titanium alloy Ti-6Al-4V with special emphasis on the transition between β-titanium and melt. The results are discussed and compared to those of more conventional modelling approaches.

scholarly journals Experimental Calibration of a Cahn-Hilliard Phase-Field Model for Phase Transformations in Li-Sn Electrodes

2016 ◽  
Vol 163 (13) ◽  
pp. A2647-A2659 ◽  
Author(s):  
Srivatsan Hulikal ◽  
Chun-Hao Chen ◽  
Eric Chason ◽  
Allan Bower
Keyword(s):  
Phase Transformations ◽  
Phase Field ◽  
Field Model ◽  
Phase Field Model ◽  
Experimental Calibration

2D Phase-Field Simulation of the Directional Solidification Process

2014 ◽  
Vol 704 ◽  
pp. 17-21 ◽  
Author(s):  
Alexandre Furtado Ferreira ◽  
José Adilson de Castro ◽  
Ivaldo Leão Ferreira
Keyword(s):  
Directional Solidification ◽  
Phase Field ◽  
Field Model ◽  
Solid Phase ◽  
Morphological Evolution ◽  
Phase Field Model ◽  
Columnar Dendrite ◽  
Liquid Region ◽  
Field Equations ◽  
Cu Alloy

The microstructure evolution during the directional solidification of Al-Cu alloy is simulated using a phase field model. The transformation from liquid to solid phase is a non-equilibrium process with three regions (liquid, solid and interface) involved. Phase field model is defined for each of the three regions. The evolution of each phase is calculated by a set of phase field equations, whereas the solute in those regions is calculated by a concentration equation. In this work, the phase field model which is generally valid for most kinds of transitions between phases, it is applied to the directional solidification problem. Numerical results for the morphological evolution of columnar dendrite in Al-Cu alloy are in agreement with experimental observations found in the literature. The growth velocity of the dendrite tip and the concentration profile in the solid, interface and liquid region were calculated.

Phase field model of uranium carbide solidification through a combined KKS and orientation field approach

2019 ◽  
Vol 31 (12) ◽  
pp. 125901
Author(s):  
Jacob L Bair ◽  
David G Abrecht ◽  
Dallas D Reilly ◽  
Matthew T Athon ◽  
Jordan F Corbey
Keyword(s):  
Phase Field ◽  
Field Model ◽  
Phase Field Model ◽  
Orientation Field ◽  
Field Approach ◽  
Uranium Carbide

A phase field model of the premelting of grain boundaries in pure materials

2000 ◽  
Vol 652 ◽  
Author(s):  
Alexander E. Lobkovsky ◽  
James A. Warren
Keyword(s):  
Grain Boundaries ◽  
Phase Field ◽  
Field Model ◽  
Solid Phase ◽  
Phase Field Model ◽  
Field Variable ◽  
High Angle ◽  
Unified Framework ◽  
Crystalline Orientation ◽  
Solid Liquid

ABSTRACTWe present a phase field model of solidification which includes the effects of the crystalline orientation in the solid phase. This model describes grain boundaries as well as solid-liquid boundaries within a unified framework. With an appropriate choice of coupling of the phase field variable to the gradient of the crystalline orientation variable in the free energy, we find that high angle boundaries undergo a premelting transition. As the melting temperature is approached from below, low angle grain boundaries remain narrow. The width of the liquid layer at high angle grain boundaries diverges logarithmically.

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