TY - JOUR
T1 - Characterization of dislocation loops and chromium-rich precipitates in ferritic iron-chromium alloys as means of void swelling suppression
AU - Terentyev, Dmitry
AU - Olsson, Pär
AU - Malerba, Lorenzo
AU - Barashev, Alexander V.
A2 - Bonny, Giovanni
N1 - Score = 10
PY - 2007/5/31
Y1 - 2007/5/31
N2 - We have used both ab initio and empirical potential based molecular dynamics and static calculations to parameterize a model accounting for the mobility of self-interstitial clusters and small dislocation loops in Fe-Cr alloys depending on Cr content. Particularly, we have considered the interval of 5-15% of Cr, corresponding to the typical concentration of Cr in ferritic/martensitic steels. The mobility of self-interstitial clusters and small dislocation loops was found to be strongly reduced in the presence of Cr due to attractive interaction between self-interstitials and Cr atoms, whereas Cr-rich precipitates act as repulsive obstacles. The results obtained allow the experimental trend of swelling measurements in neutron and high-energy electron irradiated Fe-Cr alloys to be interpreted and explained.
AB - We have used both ab initio and empirical potential based molecular dynamics and static calculations to parameterize a model accounting for the mobility of self-interstitial clusters and small dislocation loops in Fe-Cr alloys depending on Cr content. Particularly, we have considered the interval of 5-15% of Cr, corresponding to the typical concentration of Cr in ferritic/martensitic steels. The mobility of self-interstitial clusters and small dislocation loops was found to be strongly reduced in the presence of Cr due to attractive interaction between self-interstitials and Cr atoms, whereas Cr-rich precipitates act as repulsive obstacles. The results obtained allow the experimental trend of swelling measurements in neutron and high-energy electron irradiated Fe-Cr alloys to be interpreted and explained.
KW - ferritic alloys
KW - swelling
KW - precipitates
KW - dislocation loop
KW - multiscale modelling
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_81602
UR - http://knowledgecentre.sckcen.be/so2/bibref/4322
U2 - 10.1016/j.jnucmat.2007.01.069
DO - 10.1016/j.jnucmat.2007.01.069
M3 - Article
SN - 0022-3115
VL - 362
SP - 167
EP - 173
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 2-3
T2 - E-MRS Spring Meeting - Symposium N: Nuclear Materials and Materials for Fusion
Y2 - 29 May 2006 through 2 June 2006
ER -