skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effect of plastic deformation on deuterium retention and release in tungsten

Abstract

The effect of severe plastic deformation on the deuterium retention in tungsten exposed to high-flux low-energy plasma (flux ∼ 10{sup 24 }D/m{sup 2}/s, energy ∼ 50 eV, and fluence up to 3 × 10{sup 26 }D/m{sup 2}) at the plasma generator Pilot-PSI was studied by thermal desorption spectroscopy and scanning electron microscopy. The desorption spectra in both reference and plastically deformed samples were deconvolved into three contributions attributed to the detrapping from dislocations, deuterium-vacancy clusters, and pores, respectively. The plastically induced deformation, resulting in high dislocation density, does not change the positions of the three peaks, but alters their amplitudes as compared to the reference material. The appearance of blisters detected by scanning electron microscopy and the desorption peak attributed to the release from pores (i.e., deuterium bubbles) were suppressed in the plastically deformed samples but only up to a certain fluence. Beyond 5 × 10{sup 25 }D/m{sup 2}, the release from the bubbles in the deformed material is essentially higher than in the reference material. Based on the presented results, we suggest that a dense dislocation network increases the incubation dose needed for the appearance of blisters, associated with deuterium bubbles, by offering numerous nucleation sites for deuterium clusters eventually transforming into deuterium-vacancy clusters by punching out jogs on dislocation lines.

Authors:
; ;  [1];  [2];  [3]; ;  [4];  [1];  [5];  [6]
  1. SCK-CEN, Nuclear Materials Science Institute, Boeretang 200, 2400 Mol (Belgium)
  2. ITER Organization, Route de Vinon-sur-Verdon - CS 90 046 - 13067 St. Paul Lez Durance Cedex (France)
  3. FOM Institute DIFFER, Edisonbaan 14, 3439 MN, Nieuwegein (Netherlands)
  4. Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH (United Kingdom)
  5. (Belgium)
  6. Department of Applied Physics, Ghent University, St. Pietersnieuwstraat 41, 9000 Ghent (Belgium)
Publication Date:
OSTI Identifier:
22413154
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COMPARATIVE EVALUATIONS; DEFORMATION; DESORPTION; DEUTERIUM; DISLOCATIONS; NUCLEATION; PLASMA; PLASTICITY; RETENTION; SCANNING ELECTRON MICROSCOPY; SPECTROSCOPY; TUNGSTEN; VACANCIES

Citation Formats

Terentyev, D., E-mail: dterenty@sckcen.be, Lambrinou, K., Minov, B., De Temmerman, G., Morgan, T. W., Zayachuk, Y., Bystrov, K., Dubinko, A., Department of Applied Physics, Ghent University, St. Pietersnieuwstraat 41, 9000 Ghent, and Van Oost, G.. Effect of plastic deformation on deuterium retention and release in tungsten. United States: N. p., 2015. Web. doi:10.1063/1.4913478.
Terentyev, D., E-mail: dterenty@sckcen.be, Lambrinou, K., Minov, B., De Temmerman, G., Morgan, T. W., Zayachuk, Y., Bystrov, K., Dubinko, A., Department of Applied Physics, Ghent University, St. Pietersnieuwstraat 41, 9000 Ghent, & Van Oost, G.. Effect of plastic deformation on deuterium retention and release in tungsten. United States. doi:10.1063/1.4913478.
Terentyev, D., E-mail: dterenty@sckcen.be, Lambrinou, K., Minov, B., De Temmerman, G., Morgan, T. W., Zayachuk, Y., Bystrov, K., Dubinko, A., Department of Applied Physics, Ghent University, St. Pietersnieuwstraat 41, 9000 Ghent, and Van Oost, G.. Sat . "Effect of plastic deformation on deuterium retention and release in tungsten". United States. doi:10.1063/1.4913478.
@article{osti_22413154,
title = {Effect of plastic deformation on deuterium retention and release in tungsten},
author = {Terentyev, D., E-mail: dterenty@sckcen.be and Lambrinou, K. and Minov, B. and De Temmerman, G. and Morgan, T. W. and Zayachuk, Y. and Bystrov, K. and Dubinko, A. and Department of Applied Physics, Ghent University, St. Pietersnieuwstraat 41, 9000 Ghent and Van Oost, G.},
abstractNote = {The effect of severe plastic deformation on the deuterium retention in tungsten exposed to high-flux low-energy plasma (flux ∼ 10{sup 24 }D/m{sup 2}/s, energy ∼ 50 eV, and fluence up to 3 × 10{sup 26 }D/m{sup 2}) at the plasma generator Pilot-PSI was studied by thermal desorption spectroscopy and scanning electron microscopy. The desorption spectra in both reference and plastically deformed samples were deconvolved into three contributions attributed to the detrapping from dislocations, deuterium-vacancy clusters, and pores, respectively. The plastically induced deformation, resulting in high dislocation density, does not change the positions of the three peaks, but alters their amplitudes as compared to the reference material. The appearance of blisters detected by scanning electron microscopy and the desorption peak attributed to the release from pores (i.e., deuterium bubbles) were suppressed in the plastically deformed samples but only up to a certain fluence. Beyond 5 × 10{sup 25 }D/m{sup 2}, the release from the bubbles in the deformed material is essentially higher than in the reference material. Based on the presented results, we suggest that a dense dislocation network increases the incubation dose needed for the appearance of blisters, associated with deuterium bubbles, by offering numerous nucleation sites for deuterium clusters eventually transforming into deuterium-vacancy clusters by punching out jogs on dislocation lines.},
doi = {10.1063/1.4913478},
journal = {Journal of Applied Physics},
number = 8,
volume = 117,
place = {United States},
year = {Sat Feb 28 00:00:00 EST 2015},
month = {Sat Feb 28 00:00:00 EST 2015}
}