The Causes of Formation of the Triple Junctions of Grain Boundaries Containing Excess Free Volume in fcc Metals at Crystallization

Abstract:

The formation conditions of strained (non-equilibrium) triple junctions of grain boundaries were studied by the method of molecular dynamics. It is shown that strained triple junctions, containing excess free volume, mainly forms during crystallization process in the result of "locking" of the liquid phase density at a meeting of the three crystallization fronts and, as a consequence, of the concentration of excess free volume in the triple junction after solidification.

• Periodical: Solid State Phenomena (Volume 247)
• Pages: 3-8
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.247.3
• Online since: March 2016
• Authors: Gennady M. Poletaev, Darya V. Novoselova, Valentina M. Kaygorodova
• Keywords: Crystallization, Dislocation, Free Volume, Grain Boundary, Molecular Dynamics, Tilt Boundary, Triple Junction

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