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Helena Van Swygenhoven

Related publications (76)

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Stacking fault tetrahedra formation in the neighbourhood of grain boundaries

Helena Van Swygenhoven

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 produ ...

2003

SIA activity during irradiation of nanocrystalline Ni

Helena Van Swygenhoven

Cascade damage simulations in a 12 nm nanocrystalline Ni sample are presented. Sinks present in the sample such as grain boundaries and vacancy defects influence the movement of self-interstitial atoms (SIAs). Two temporal mechanisms of SIA activity during ...

2003

Radiation damage near grain boundaries

Helena Van Swygenhoven

Large-scale molecular dynamics of cascade production of the primary damage state are performed in nanocrystalline nickel with an average grain diameter of 12 nm and primary knock-on atom kinetic energies ranging from 5 to 30 keV. The role of the grain boun ...

2003

Movement of interstitial clusters in stress gradients of grain boundaries

Helena Van Swygenhoven

Simulations of nanocrystalline materials reveal that the pressure gradient present within the structure can play a key role in the movement of self-interstitial atoms (SIA's) to surrounding grain boundaries and therefore in the resulting defect structure f ...

2003

Nanocrystalline electrodeposited Ni: microstructure and tensile properties

Helena Van Swygenhoven, Florian Dalla Torre

The microstructure of commercially available nanocrystalline (nc) electroplated Ni foils is studied by means of Xray diffraction and transmission electron microscopy. It is shown that the microstructure is inhomogeneous and batch-dependent. Tensile propert ...

2002

Computer simulation of displacement cascades in nanocrystalline Ni

Helena Van Swygenhoven

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 p ...

2002