TY - JOUR
T1 - Positron annihilation spectroscopy on binary Fe–Cr alloys and ferritic/martensitic steels after neutron irradiation
AU - Lambrecht, Marlies
AU - Malerba, Lorenzo
A2 - Konstantinovic, Milan
N1 - Score = 10
PY - 2011/10
Y1 - 2011/10
N2 - The irradiation-induced behaviour of iron–chromium model alloys and high chromium ferritic/martensitic steels have been studied using positron annihilation measurements. Both the positron lifetime and coincidence Doppler broadening techniques were used in a complementary way. It is shown that the presence of chromium in iron-based alloys significantly reduces the concentration of vacancies to the extent that the formation of clusters is hindered. The observed vacancy behaviour as a function of the chromium content is fully consistent with the findings of void swelling suppression in chromium-rich alloys and can be rationalized based on existing models. Finally, the information obtained for the ferritic/martensitic steels shows good agreement with the results for binary model alloys. Compared with the vacancy behaviour in pure iron, this confirms the major influence of chromium on the nanostructural evolution of these steels under irradiation.
AB - The irradiation-induced behaviour of iron–chromium model alloys and high chromium ferritic/martensitic steels have been studied using positron annihilation measurements. Both the positron lifetime and coincidence Doppler broadening techniques were used in a complementary way. It is shown that the presence of chromium in iron-based alloys significantly reduces the concentration of vacancies to the extent that the formation of clusters is hindered. The observed vacancy behaviour as a function of the chromium content is fully consistent with the findings of void swelling suppression in chromium-rich alloys and can be rationalized based on existing models. Finally, the information obtained for the ferritic/martensitic steels shows good agreement with the results for binary model alloys. Compared with the vacancy behaviour in pure iron, this confirms the major influence of chromium on the nanostructural evolution of these steels under irradiation.
KW - Ferritic/martensitic steels
KW - Neutron irradiation
KW - Positron annihilation
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_115243
UR - http://knowledgecentre.sckcen.be/so2/bibref/8228
U2 - 10.1016/j.actamat.2011.06.046
DO - 10.1016/j.actamat.2011.06.046
M3 - Article
SN - 1359-6454
VL - 59
SP - 6547
EP - 6555
JO - Acta Materialia
JF - Acta Materialia
IS - 17
ER -