Computer simulation of displacement cascades in nanocrystalline Ni

Large-scale molecular dynamics of cascade production of the primary damage state are performed in fcc nanocrystalline Ni of average grain diameters of 5 and 12 nm. Primary knock-on atom kinetic energies of 5-30 keV are simulated. During the thermal spike phase, significant atomic motion towards the surrounding grain boundary structure is observed, characterized by many replacement-collision sequences. Upon resolidification, the excess volume condenses to form vacancy dominated defects with a complex partial dislocation network forming at higher energies.


Published in:
Physical Review Letters, 88, 12
Year:
2002
ISSN:
0031-9007
ISBN:
0031-9007
Laboratories:
SPC
CRPP




 Record created 2008-04-16, last modified 2018-09-13


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