Hardening and microstructural evolution in A533B steels under neutron irradiation and a direct comparison with electron irradiation

被引：15

作者：

Fujii, K. ^{[1
]}

Nakata, H. ^{[1
]}

Fukuya, K. ^{[1
]}

Ohkubo, T. ^{[2
]}

Hono, K. ^{[2
]}

Nagai, Y. ^{[3
]}

Hasegawa, M. ^{[3
]}

Yoshiie, T. ^{[4
]}

机构：

[1] Inst Nucl Safety Syst, Mihama, Fukui 9191205, Japan

[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050045, Japan

[3] Tohoku Univ, Oarai, Ibaraki 3111313, Japan

[4] Kyoto Univ, Kumatori, Osaka 5900494, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 2010年 / 400卷 / 01期

关键词：

PRESSURE-VESSEL STEELS; POSITRON-ANNIHILATION; REACTOR; CLUSTERS; FE;

D O I：

10.1016/j.jnucmat.2010.02.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A5338 steels irradiated at 290 degrees C up to 10 mdpa in the Kyoto University Reactor were examined by hardness, positron annihilation and atom probe measurements. Dose dependent irradiation hardening and formation of Cu-rich clusters were confirmed in medium Cu (0.12% and 0.16%Cu) steels whereas neither hardening nor cluster formation was detected in low Cu (0.03%Cu) steel. No microvoids were formed in any of the steels. Post-irradiation annealing in medium Cu steels revealed that the hardening recovery at temperatures above 350-400 degrees C could be attributed to compositional changes and dissociation of the Curich clusters. Compared to electron irradiation at almost the same dose and dose rate, KUR irradiation caused almost the same hardening and produced Cu-rich clusters, more solute-enriched with larger size and lower density. Considering lower production of freely-migrating vacancies in neutron irradiation, the results suggested that cascades enhance the formation of Cu-rich clusters. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：46 / 55

页数：10

共 29 条

[21] Irradiation-induced Cu aggregations in Fe: An origin of embrittlement of reactor pressure vessel steels [J].