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Effect of high flux plasma exposure on the micro-structural and mechanical properties of ITER specification tungsten

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Abstract
We have performed a combined study using transmission electron microscopy (TEM), nuclear reaction analysis (NRA) and nano-indentation (NI) techniques to reveal the impact of high flux plasma exposure on the properties of a sub-surface region of the commercially available pure tungsten fabricated following the ITER specification. TEM examination revealed the formation of a dense dislocation network and dislocation tangles, resulting in a strong increase in the dislocation density by at least one order of magnitude as compared to the bulk density. The plasma-induced dislocation microstructure vanishes within a depth of about 10-15 mu m from the top of the exposed surface. Surface hardness after the plasma exposure was characterized by NI and was found to increase significantly in the sub-surface region of 1.5-3 mu m. That was attributed to the resistance of the plasma-induced dislocation networks and deuterium-induced defects, whose presence within a depth of similar to 1 mu m was unambiguously detected by the NRA measurements as well. (C) 2016 Elsevier B.V. All rights reserved.
Keywords
RETENTION, DEUTERIUM, ENERGY, High flux plasma, Tungsten, Dislocations

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MLA
Dubinko, Andrii et al. “Effect of High Flux Plasma Exposure on the Micro-structural and Mechanical Properties of ITER Specification Tungsten.” NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 393 (2017): 155–159. Print.
APA
Dubinko, A., Terentyev, D., Bakaeva, A., Pardoen, T., Zibrov, M., & Morgan, T. (2017). Effect of high flux plasma exposure on the micro-structural and mechanical properties of ITER specification tungsten. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 393, 155–159. Presented at the 13th International Conference on Computer Simulation of Radiation Effects in Solids (COSIRES).
Chicago author-date
Dubinko, Andrii, D Terentyev, Anastasiia Bakaeva, T Pardoen, Mikhail Zibrov, and TW Morgan. 2017. “Effect of High Flux Plasma Exposure on the Micro-structural and Mechanical Properties of ITER Specification Tungsten.” Nuclear Instruments & Methods in Physics Research Section B-beam Interactions with Materials and Atoms 393: 155–159.
Chicago author-date (all authors)
Dubinko, Andrii, D Terentyev, Anastasiia Bakaeva, T Pardoen, Mikhail Zibrov, and TW Morgan. 2017. “Effect of High Flux Plasma Exposure on the Micro-structural and Mechanical Properties of ITER Specification Tungsten.” Nuclear Instruments & Methods in Physics Research Section B-beam Interactions with Materials and Atoms 393: 155–159.
Vancouver
1.
Dubinko A, Terentyev D, Bakaeva A, Pardoen T, Zibrov M, Morgan T. Effect of high flux plasma exposure on the micro-structural and mechanical properties of ITER specification tungsten. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS. Amsterdam: Elsevier Science Bv; 2017;393:155–9.
IEEE
[1]
A. Dubinko, D. Terentyev, A. Bakaeva, T. Pardoen, M. Zibrov, and T. Morgan, “Effect of high flux plasma exposure on the micro-structural and mechanical properties of ITER specification tungsten,” NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, vol. 393, pp. 155–159, 2017.
@article{8519251,
  abstract     = {We have performed a combined study using transmission electron microscopy (TEM), nuclear reaction analysis (NRA) and nano-indentation (NI) techniques to reveal the impact of high flux plasma exposure on the properties of a sub-surface region of the commercially available pure tungsten fabricated following the ITER specification. TEM examination revealed the formation of a dense dislocation network and dislocation tangles, resulting in a strong increase in the dislocation density by at least one order of magnitude as compared to the bulk density. The plasma-induced dislocation microstructure vanishes within a depth of about 10-15 mu m from the top of the exposed surface. Surface hardness after the plasma exposure was characterized by NI and was found to increase significantly in the sub-surface region of 1.5-3 mu m. That was attributed to the resistance of the plasma-induced dislocation networks and deuterium-induced defects, whose presence within a depth of similar to 1 mu m was unambiguously detected by the NRA measurements as well. (C) 2016 Elsevier B.V. All rights reserved.},
  author       = {Dubinko, Andrii and Terentyev, D and Bakaeva, Anastasiia and Pardoen, T and Zibrov, Mikhail and Morgan, TW},
  issn         = {0168-583X},
  journal      = {NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS},
  keywords     = {RETENTION,DEUTERIUM,ENERGY,High flux plasma,Tungsten,Dislocations},
  language     = {eng},
  location     = {Loughborough Univ, Loughborough, ENGLAND},
  pages        = {155--159},
  publisher    = {Elsevier Science Bv},
  title        = {Effect of high flux plasma exposure on the micro-structural and mechanical properties of ITER specification tungsten},
  url          = {http://dx.doi.org/10.1016/j.nimb.2016.10.041},
  volume       = {393},
  year         = {2017},
}

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