Microstructural changes in a Russian-type reactor weld material after neutron irradiation, post-irradiation annealing and re-irradiation studied by atom probe tomography and positron annihilation spectroscopy

被引：27
作者：
Kuramoto, A. [1 ]
Toyama, T. [1 ]
Nagai, Y. [1 ]
Inoue, K. [1 ]
Nozawa, Y. [1 ]
Hasegawa, M. [2 ]
Valo, M. [3 ]
机构：
[1] Tohoku Univ, Inst Mat Res, Oarai Ctr, Oarai, Ibaraki 3111313, Japan
[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[3] VTT Tech Res Ctr Finland, Espoo 02044, Finland
来源：
ACTA MATERIALIA | 2013年 / 61卷 / 14期
关键词：
Irradiation embrittlement; Ferritic steel; Atom probe tomography; Positron annihilation; PRESSURE-VESSEL STEELS; MODEL ALLOYS; EMBRITTLEMENT; EVOLUTION; BEHAVIOR; IRON; MICROSCOPY; VVER-440; COPPER; SANS;
D O I：
10.1016/j.actamat.2013.05.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present a microstructural study of a surveillance test specimen from a reactor pressure vessel steel of a Russian-type nuclear reactor after neutron irradiation, post-irradiation annealing and re-irradiation, using atom probe tomography (APT) and positron annihilation spectroscopy (PAS). The APT results showed the formation of Cu-rich solute nano-clusters (CRCs) during the initial irradiation and their subsequent coarsening during annealing. After re-irradiation, new CRCs have been observed. The irradiation-hardening almost recovered during annealing. However, by re-irradiation, hardening comparable to that by the initial irradiation was observed. The hardening due to the CRCs formed during the initial irradiation, estimated using the Russell-Brown model, was almost the same as that observed. However, the estimated hardening after the re-irradiation was about half of the measured one. The other hardening is attributed to the newly formed MDs by the re-irradiation, which was evidenced by PAS. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：5236 / 5246
页数：11
相关论文
共 32 条
[1]   Microstructural characterization of irradiation-induced Cu-enriched clusters in reactor pressure vessel steels [J].
Carter, RG ;
Soneda, N ;
Dohi, K ;
Hyde, JM ;
English, CA ;
Server, WL .
JOURNAL OF NUCLEAR MATERIALS, 2001, 298 (03) :211-224
[2]   Fine structure behaviour of VVER-1000 RPV materials under irradiation [J].
Gurovich, B. A. ;
Kuleshova, E. A. ;
Shtrombakh, Ya I. ;
Erak, D. Yu. ;
Chernobaeva, A. A. ;
Zabusov, O. O. .
JOURNAL OF NUCLEAR MATERIALS, 2009, 389 (03) :490-496
[3]   Intergranular and intragranular phosphorus segregation in Russian pressure vessel steels due to neutron irradiation [J].
Gurovich, BA ;
Kuleshova, EA ;
Shtrombakh, YI ;
Zabusov, OO ;
Krasikov, EA .
JOURNAL OF NUCLEAR MATERIALS, 2000, 279 (2-3) :259-272
[4]   Transmission electron microscopy study on neutron irradiated pure iron and RPV model alloys [J].
Hernandez-Mayoral, M. ;
Gomez-Briceno, D. .
JOURNAL OF NUCLEAR MATERIALS, 2010, 399 (2-3) :146-153
[5]  
Hyde J.M., 2001, MAT RES SOC S, V650
[6]   Time evolution of positron affinity trapping at embedded nanoparticles by age-momentum correlation [J].
Inoue, K. ;
Nagai, Y. ;
Tang, Z. ;
Toyama, T. ;
Hosoda, Y. ;
Tsuto, A. ;
Hasegawa, M. .
PHYSICAL REVIEW B, 2011, 83 (11)
[7]   PULSED-LASER ATOM-PROBE FIELD-ION MICROSCOPY [J].
KELLOGG, GL ;
TSONG, TT .
JOURNAL OF APPLIED PHYSICS, 1980, 51 (02) :1184-1193
[8]   Local Electrode Atom Probes [J].
Kelly, TF ;
Larson, DJ .
MATERIALS CHARACTERIZATION, 2000, 44 (1-2) :59-85
[9]   Comparison of microstructural features of radiation embrittlement of VVER-440 and VVER-1000 reactor pressure vessel steels [J].
Kuleshova, EA ;
Gurovich, BA ;
Shtrombakh, YI ;
Erak, DY ;
Lavrenchuk, OV .
JOURNAL OF NUCLEAR MATERIALS, 2002, 300 (2-3) :127-140
[10]   Post-irradiation annealing behavior of microstructure and hardening of a reactor pressure vessel steel studied by positron annihilation and atom probe tomography [J].
Kuramoto, A. ;
Toyama, T. ;
Takeuchi, T. ;
Nagai, Y. ;
Hasegawa, M. ;
Yoshiie, T. ;
Nishiyama, Y. .
JOURNAL OF NUCLEAR MATERIALS, 2012, 425 (1-3) :65-70
1234