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Interdiffusion and Order Fracture over Grain Boundaries in the Deformed Ni3Al Intermetallide

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Abstract:

The peculiarities of diffusion process and changes of long and short order parameters at an elastic and plastic deformation of compression and tension near grain boundaries with disorientation axis <111> are studied by the method of molecular dynamics. Whirl displacements of atoms destroying the order near grain boundary superdislocations are noticed at uniaxial deformation of compression. The fracture of superstructural and structural order at uniaxial deformation is accompanied by the deformation of amorphous area. Interdiffusion mechanism is changed in the dependence on deformation, temperature and boundary types.

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Periodical:

Materials Science Forum (Volumes 567-568)

Pages:

161-164

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.567-568.161

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Online since:

December 2007

Authors:

Mikhail D. Starostenkov, Gennady M. Poletaev, Roman Y. Rakitin, Dmitry V. Sinyaev

Keywords:

Deformation, Diffusion, Fracture, Grain Boundary, Intermetallide, Migration, Temperature

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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References

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