Phase field study the effects of interfacial energy anisotropy on the thermal migration of voids

Numerical simulations based on a new regularized phase field model were presented, simulating the solidification of magnesium alloy. The effects of weak and strong interfacial energy anisotropy on the dendrite growth are studied. The results indicate that with weak interfacial energy anisotropy, the entire dendrite displays six-fold symmetry and no secondary branch appeared. Under strong interfacial energy anisotropy conditions, corners form on both the main stem and the tips of the side branches of the dendrites, the entire facet dendrite displays six-fold symmetry. As the solidification time increases, the tip temperature and velocity of the dendrite and facet dendrite finally tend to stable values. The stable velocity of the facet dendrite is 0.4 at ε6 is 0.05 and this velocity is twice that observed (0.2) at ε6 is 0.005.

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Simulation of facet dendrite growth with strong interfacial energy anisotropy by phase field method

Journal of Central South University ◽

10.1007/s11771-015-2593-8 ◽

2015 ◽

Vol 22 (3) ◽

pp. 855-861 ◽

Cited By ~ 1

Author(s):

Xun-feng Yuan ◽

Bao-ying Liu ◽

Chun Li ◽

Chun-sheng Zhou ◽

Yu-tian Ding

Keyword(s):

Phase Field ◽

Interfacial Energy ◽

Field Method ◽

Dendrite Growth ◽

Phase Field Method ◽

Energy Anisotropy ◽

Interfacial Energy Anisotropy

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Phase field model for strong interfacial energy anisotropy of HCP materials

Transactions of Nonferrous Metals Society of China ◽

10.1016/s1003-6326(14)63426-9 ◽

2014 ◽

Vol 24 (9) ◽

pp. 2911-2919 ◽

Cited By ~ 2

Author(s):

Xun-feng YUAN ◽

Bao-ying LIU ◽

Chun LI ◽

Chun-sheng ZHOU ◽

Yu-tian DING

Keyword(s):

Phase Field ◽

Interfacial Energy ◽

Field Model ◽

Phase Field Model ◽

Hcp Materials ◽

Energy Anisotropy ◽

Interfacial Energy Anisotropy

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Phase field study of the effect of grain boundary energy anisotropy on grain growth

Computational Materials Science ◽

10.1016/j.commatsci.2009.01.026 ◽

2009 ◽

Vol 46 (1) ◽

pp. 21-25 ◽

Cited By ~ 19

Author(s):

Ashis Mallick ◽

Srikanth Vedantam

Keyword(s):

Grain Boundary ◽

Field Study ◽

Grain Growth ◽

Phase Field ◽

Boundary Energy ◽

Grain Boundary Energy ◽

Energy Anisotropy

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Phase-Field Simulation of δ-Ni2Si Precipitation in Cu-Ni-Si Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.689.184 ◽

2011 ◽

Vol 689 ◽

pp. 184-189

Author(s):

Yong Qiang Long ◽

Ping Liu ◽

Yong Liu

Keyword(s):

Phase Field ◽

Interfacial Energy ◽

Elastic Energy ◽

Phase Field Model ◽

Precipitation Process ◽

Phase Precipitation ◽

Coarsening Behavior ◽

Δ Phase ◽

Energy Anisotropy ◽

Precipitation Phase

The phase-field model is established for precipitation transformations in multi-component alloy, which incorporates the interfacial energy and elastic energy anisotropy. The mechanism of the precipitation phase transition is revealed by means of the simulation of δ-phase precipitation process in Cu-4.0at.%Ni-2.0at.%Si alloy, and furthermore, the δ-phase precipitation kinetics is built at the temperature of 450°C. Under the influence of both interfacial energy and elastic energy anisotropy, δ-Ni2Si is presented in disc-shaped precipitates. The simulation patterns show that when one precipitate hits another precipitate with a different orientation, it stops growing, consequently forming a “T”-shape precipitate configuration. When two precipitates with the same orientations grow and hit each other, they connect or coarsen only if the spacing between the precipitates is very small. Therefore, the coarsening behavior of disc-shaped precipitate should be completely different from that of spherical precipitates.

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