Published April 2018 | Version v1
Journal article Metadata-only

Positron annihilation and nano-indentation analysis of irradiation effects on the microstructure and hardening of A508-3 steels used in Chinese HTGR

Creators

  • 1. Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing (China)
  • 2. Department of Radiation Science and Technology, Delft University of Technology, Delft (Netherlands)
  • 3. Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing (China)
  • 4. Shanghai Electric Nuclear Power Equipment Co., Ltd., Shanghai (China)

Description

The irradiation and annealing behavior of Chinese A508-3 reactor pressure vessel (RPV) steel (0.04 wt% Cu) after 3 MeV Fe-ion irradiation ranging from 0.1 to 20 dpa at room temperature (called RTRPV) and high temperature (250°C, called HTRPV) was studied by positron annihilation Doppler broadening (PADB) spectroscopy and nano-indentation hardness. PADB showed that the density of vacancy-type defects was higher for low-temperature irradiations. The higher hardness was found after high-temperature irradiation because of the formation of solute clusters during irradiation. Positron annihilation measurements revealed the interaction and clustering of vacancies with solute clusters which were introduced by Fe-ion irradiation. For both RTRPVs and HTRPVs, the positron defect parameter and positron diffusion length showed the recovery of the irradiation-induced defects. Total recovery was observed after annealing at 450°C. (author)

Availability note (English)

Available from http://dx.doi.org/10.1080/00223131.2017.1403385

Additional details

Identifiers

DOI
10.1080/00223131.2017.1403385;

Publishing Information

Journal Title
Journal of Nuclear Science and Technology (Tokyo) (Online)
Journal Volume
55
Journal Issue
4
Journal Page Range
p. 418-423
ISSN
1881-1248

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
49074717
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
DOPPLER BROADENING; EMBRITTLEMENT; HTGR TYPE REACTORS; INDENTATION TESTING; IRRADIATION; MICROSTRUCTURE; NEUTRON FLUX; POSITRON ANNIHILATION SPECTROSCOPY; RADIATION HARDENING; REACTOR VESSELS; STEEL-ASTM-A508; TEMPERATURE DEPENDENCE; VACANCIES
Descriptors DEC
ALLOYS; CARBON ADDITIONS; CONTAINERS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; GAS COOLED REACTORS; GRAPHITE MODERATED REACTORS; HARDENING; IRON ALLOYS; IRON BASE ALLOYS; LINE BROADENING; LOW ALLOY STEELS; MATERIALS TESTING; PHYSICAL RADIATION EFFECTS; POINT DEFECTS; RADIATION EFFECTS; RADIATION FLUX; REACTORS; SPECTROSCOPY; STEELS; TESTING; TRANSITION ELEMENT ALLOYS

Optional Information

Notes
27 refs., 6 figs., 1 tab.