Neutron irradiation;
Irradiation hardening;
Iron base alloy;
Reactor pressure vessel steel;
Cu impurity;
SANS;
Microstructure;
ANGLE NEUTRON-SCATTERING;
POSITRON-ANNIHILATION;
MECHANICAL-PROPERTIES;
ENRICHED CLUSTERS;
RPV STEEL;
FE;
EVOLUTION;
ALLOYS;
SIZE;
ELECTRON;
D O I:
10.1016/j.nimb.2012.03.008
中图分类号:
TH7 [仪器、仪表];
学科分类号:
0804 ;
080401 ;
081102 ;
摘要:
Reactor pressure vessel (RPV) steel, when exposed to neutron irradiation, induces the formation of nano-sized features. Using small angle neutron scattering (SANS) we have studied the neutron fluence dependence of the precipitate volume fraction for high-Cu and low-Cu materials separately. Cu-rich precipitates have long been recognized to play the dominant role in embrittlement of Cu-bearing RPV steels. In contrast, Mn-Ni-rich precipitates seem to govern embrittlement in the case of low levels of impurity Cu. The objective is to work out the resulting differences from the microstructural point of view. For low-Cu materials, the volume fraction was found to be within the detection limit of SANS at fluences below an apparent threshold fluence, whereas the slope increases considerably beyond. The relationship between irradiation-induced yield stress increase and precipitate volume fraction was also considered. We have derived estimates of the obstacle strength for Cu-rich precipitates and for Mn-Ni-rich precipitates. (C) 2012 Elsevier B.V. All rights reserved.
机构:
Commiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, NetherlandsCommiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, Netherlands
Ballesteros, A.
;
Ahlstrand, R.
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机构:
Commiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, NetherlandsCommiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, Netherlands
Ahlstrand, R.
;
Bruynooghe, C.
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机构:
Commiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, NetherlandsCommiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, Netherlands
Bruynooghe, C.
;
Chernobaeva, A.
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h-index: 0
机构:
Kurchatov Inst, Moscow, RussiaCommiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, Netherlands
Chernobaeva, A.
;
Kevorkyan, Y.
论文数: 0引用数: 0
h-index: 0
机构:
Kurchatov Inst, Moscow, RussiaCommiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, Netherlands
Kevorkyan, Y.
;
Erak, D.
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h-index: 0
机构:
Kurchatov Inst, Moscow, RussiaCommiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, Netherlands
Erak, D.
;
Zurko, D.
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h-index: 0
机构:
Kurchatov Inst, Moscow, RussiaCommiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, Netherlands
机构:
Univ Lille 1, UMR 8517, Lab Met Phys & Genie Mat, F-59655 Villeneuve Dascq, FranceUniv Lille 1, UMR 8517, Lab Met Phys & Genie Mat, F-59655 Villeneuve Dascq, France
机构:
Commiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, NetherlandsCommiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, Netherlands
Ballesteros, A.
;
Ahlstrand, R.
论文数: 0引用数: 0
h-index: 0
机构:
Commiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, NetherlandsCommiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, Netherlands
Ahlstrand, R.
;
Bruynooghe, C.
论文数: 0引用数: 0
h-index: 0
机构:
Commiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, NetherlandsCommiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, Netherlands
Bruynooghe, C.
;
Chernobaeva, A.
论文数: 0引用数: 0
h-index: 0
机构:
Kurchatov Inst, Moscow, RussiaCommiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, Netherlands
Chernobaeva, A.
;
Kevorkyan, Y.
论文数: 0引用数: 0
h-index: 0
机构:
Kurchatov Inst, Moscow, RussiaCommiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, Netherlands
Kevorkyan, Y.
;
Erak, D.
论文数: 0引用数: 0
h-index: 0
机构:
Kurchatov Inst, Moscow, RussiaCommiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, Netherlands
Erak, D.
;
Zurko, D.
论文数: 0引用数: 0
h-index: 0
机构:
Kurchatov Inst, Moscow, RussiaCommiss European Communities, Joint Res Ctr, Inst Energy, SPNR Unit, NL-1755 ZG Petten, Netherlands
机构:
Univ Lille 1, UMR 8517, Lab Met Phys & Genie Mat, F-59655 Villeneuve Dascq, FranceUniv Lille 1, UMR 8517, Lab Met Phys & Genie Mat, F-59655 Villeneuve Dascq, France