Disconnection Motion in Low- and High-Angle Symmetrical Tilt Grain Boundaries in HCP Metal

Robert C. Pond; John P. Hirth; Hassan A. Khater; Anna Serra

doi:10.4028/www.scientific.net/MSF.753.125

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HomeMaterials Science ForumMaterials Science Forum Vol. 753Disconnection Motion in Low- and High-Angle...

Disconnection Motion in Low- and High-Angle Symmetrical Tilt Grain Boundaries in HCP Metal

Abstract:

The structure of disconnections in symmetrical low- and high-angle [0001] tilt boundaries in an hcp metal are studied using atomic-scale simulation. Applied engineering strains cause such defects to move conservatively along the boundaries, producing coupled shear and migration. The Peierls stresses causing such motion are found to decrease precipitously through the transition from low- to high-angle boundaries. The reason underlying this behaviour is discussed.

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Periodical:

Materials Science Forum (Volume 753)

Pages:

125-130

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.753.125

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Online since:

March 2013

Authors:

Robert C. Pond, John P. Hirth, Hassan A. Khater, Anna Serra

Keywords:

Disconnection, Grain Boundary Shear, High Angle Boundary, Low Angle Boundary, Migration

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