Phys. Rev. Lett. 99, 025501 (2007) [4 pages]Molecular Dynamics Simulation of Ga Penetration along Grain Boundaries in Al: A Dislocation Climb MechanismReceived 16 February 2007; published 13 July 2007 Many systems where a liquid metal is in contact with a polycrystalline solid exhibit deep liquid grooves where the grain boundary meets the solid-liquid interface. For example, liquid Ga quickly penetrates deep into grain boundaries in Al, leading to intergranular fracture under very small stresses. We report on a series of molecular dynamics simulations of liquid Ga in contact with an Al bicrystal. We identify the mechanism for liquid metal embrittlement, develop a new model for it, and show that is in excellent agreement with both simulation and experimental data. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.025501
DOI:
10.1103/PhysRevLett.99.025501
PACS:
62.20.Mk, 68.08.De, 81.40.Np
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