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Mechanical properties of tungsten irradiated with high-energy protons and spallation neutrons

Habainy, Jemila LU ; Dai, Yong ; Lee, Yongjoong and Iyengar, Srinivasan LU (2019) In Journal of Nuclear Materials 514. p.189-195
Abstract

In this work, 3-point bending tests and micro-hardness measurements were performed on pure tungsten irradiated with high-energy protons and spallation neutrons in a target of the Swiss Spallation Neutron Source (SINQ). The specimens were irradiated to doses in the range of 1.3–3.5 dpa, with 37–140 appm He, at temperatures between 75 and 110 °C. During 3-point bending tests performed at temperatures up to 500 °C, all the irradiated specimens fractured in the elastic regime at stresses much below those for the unirradiated reference specimens. The micro-hardness measurements indicate significant irradiation induced hardening under all irradiation conditions. Observation of the fracture surfaces of tested irradiated specimens shows brittle... (More)

In this work, 3-point bending tests and micro-hardness measurements were performed on pure tungsten irradiated with high-energy protons and spallation neutrons in a target of the Swiss Spallation Neutron Source (SINQ). The specimens were irradiated to doses in the range of 1.3–3.5 dpa, with 37–140 appm He, at temperatures between 75 and 110 °C. During 3-point bending tests performed at temperatures up to 500 °C, all the irradiated specimens fractured in the elastic regime at stresses much below those for the unirradiated reference specimens. The micro-hardness measurements indicate significant irradiation induced hardening under all irradiation conditions. Observation of the fracture surfaces of tested irradiated specimens shows brittle fracture behaviour in general, whereas detailed features depend strongly on irradiation dose and test temperature.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
3-Point bending test, Irradiation effects, Mechanical properties, Spallation target, Tungsten
in
Journal of Nuclear Materials
volume
514
pages
7 pages
publisher
Elsevier
external identifiers
  • scopus:85057622644
ISSN
0022-3115
DOI
10.1016/j.jnucmat.2018.12.003
language
English
LU publication?
yes
id
8825babc-399c-4409-b4c2-2c118ffc0651
date added to LUP
2018-12-17 14:34:48
date last changed
2020-02-19 05:15:06
@article{8825babc-399c-4409-b4c2-2c118ffc0651,
  abstract     = {<p>In this work, 3-point bending tests and micro-hardness measurements were performed on pure tungsten irradiated with high-energy protons and spallation neutrons in a target of the Swiss Spallation Neutron Source (SINQ). The specimens were irradiated to doses in the range of 1.3–3.5 dpa, with 37–140 appm He, at temperatures between 75 and 110 °C. During 3-point bending tests performed at temperatures up to 500 °C, all the irradiated specimens fractured in the elastic regime at stresses much below those for the unirradiated reference specimens. The micro-hardness measurements indicate significant irradiation induced hardening under all irradiation conditions. Observation of the fracture surfaces of tested irradiated specimens shows brittle fracture behaviour in general, whereas detailed features depend strongly on irradiation dose and test temperature.</p>},
  author       = {Habainy, Jemila and Dai, Yong and Lee, Yongjoong and Iyengar, Srinivasan},
  issn         = {0022-3115},
  language     = {eng},
  pages        = {189--195},
  publisher    = {Elsevier},
  series       = {Journal of Nuclear Materials},
  title        = {Mechanical properties of tungsten irradiated with high-energy protons and spallation neutrons},
  url          = {http://dx.doi.org/10.1016/j.jnucmat.2018.12.003},
  doi          = {10.1016/j.jnucmat.2018.12.003},
  volume       = {514},
  year         = {2019},
}