Research output: Contribution to journal › Article › peer-review
On the onset of void swelling in pure tungsten under neutron irradiation: An object kinetic Monte Carlo approach. / Castin, Nicolas; Bakaev, Alexander; Bonny, Giovanni; Malerba, Lorenzo; Terentyev, Dmitry.
In: Journal of Nuclear Materials, 17.06.2017.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - On the onset of void swelling in pure tungsten under neutron irradiation: An object kinetic Monte Carlo approach
AU - Castin, Nicolas
AU - Bakaev, Alexander
AU - Bonny, Giovanni
AU - Malerba, Lorenzo
AU - Terentyev, Dmitry
N1 - score=10
PY - 2017/6/17
Y1 - 2017/6/17
N2 - We propose an object kinetic Monte Carlo (OKMC) model for describing the microstructural evolution in pure tungsten under neutron irradiation. We here focus on low doses (under 1 dpa), and we neglect transmutation in first approximation. The emphasis is mainly centred on an adequate description of neutron irradiation, the subsequent introduction of primary defects, and their thermal diffusion properties. Besides grain boundaries and the dislocation network, our model includes the contribution of carbon impurities, which are shown to have a strong influence on the onset of void swelling. Our parametric study analyses the quality of our model in detail, and confronts its predictions with experimental microstructural observations with satisfactory agreement. We highlight the importance for an accurate determination of the dissolved carbon content in the tungsten matrix, and we advocate for an accurate description of atomic collision cascades, in light of the sensitivity of our results with respect to correlated recombination.
AB - We propose an object kinetic Monte Carlo (OKMC) model for describing the microstructural evolution in pure tungsten under neutron irradiation. We here focus on low doses (under 1 dpa), and we neglect transmutation in first approximation. The emphasis is mainly centred on an adequate description of neutron irradiation, the subsequent introduction of primary defects, and their thermal diffusion properties. Besides grain boundaries and the dislocation network, our model includes the contribution of carbon impurities, which are shown to have a strong influence on the onset of void swelling. Our parametric study analyses the quality of our model in detail, and confronts its predictions with experimental microstructural observations with satisfactory agreement. We highlight the importance for an accurate determination of the dissolved carbon content in the tungsten matrix, and we advocate for an accurate description of atomic collision cascades, in light of the sensitivity of our results with respect to correlated recombination.
KW - tungsten
KW - neutron irradiation
KW - swelling
KW - kinetic
KW - monte carlo
KW - simulation
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/25257166
U2 - 10.1016/j.jnucmat.2017.06.008
DO - 10.1016/j.jnucmat.2017.06.008
M3 - Article
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
ER -
ID: 2720099