Stacking fault tetrahedra formation in the neighbourhood of grain boundaries

Large scale molecular dynamics computer simulations are performed to study the role of the grain boundary (GB) during the cascade evolution in irradiated nanocrystalline Ni. At all primary knock-on atom (PKA) energies in cascades near GBs, the damage produced after cooling down is vacancy dominated. Truncated stacking fault tetrahedra (TSFTs) are easily formed at 10 keV and higher PKA energies. At the higher energies a complex partial dislocation network forms, consisting of TSFTs. The GB acts as an interstitial sink without undergoing major structural changes. (C) 2002 Elsevier Science B.V. All rights reserved.


Published in:
Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms, 202, 51-55
Year:
2003
ISSN:
0168-583X
ISBN:
0168-583X
Laboratories:
SPC
CRPP




 Record created 2008-04-16, last modified 2018-01-28


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