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Title: Helium-implantation-induced lattice strains and defects in tungsten probed by X-ray micro-diffraction

Journal Article · · Materials & Design
 [1];  [2];  [2]; ORCiD logo [1]
  1. Univ. of Oxford (United Kingdom). Dept. of Engineering Science
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Tungsten is the main candidate material for plasma-facing armour components in future fusion reactors. Bombardment with energetic fusion neutrons causes collision cascade damage and defect formation. Interaction of defects with helium, produced by transmutation and injected from the plasma, modifies defect retention and behaviour. Here we investigate the residual lattice strains caused by different doses of helium-ion-implantation into tungsten and tungsten-rhenium alloys. Energy and depth-resolved synchrotron X-ray micro-diffraction uniquely permits the measurement of lattice strain with sub-micron 3D spatial resolution and ~10-4 strain sensitivity. Increase of helium dose from 300 appm to 3000 appm increases volumetric strain by only ~2.4 times, indicating that defect retention per injected helium is ~3 times higher at low helium doses. This suggests defect retention is not a simple function of implanted helium dose, but strongly depends on material composition and presence of impurities. Conversely, analysis of W-1 wt% Re alloy samples and of different crystal orientations shows that both the presence of rhenium, and crystal orientation, have a comparatively small effect on defect retention. These insights are key for the design of armour components in future reactors where it will be essential to account for irradiation-induced dimensional change when predicting component lifetime and performance.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
Leverhulme Trust; USDOE Office of Science (SC); Engineering and Physical Sciences Research Council (EPSRC)
Grant/Contract Number:
AC02-06CH11357; EP/H018921/1
OSTI ID:
1507089
Journal Information:
Materials & Design, Vol. 160, Issue C; ISSN 0264-1275
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

References (49)

Recent progress in research on tungsten materials for nuclear fusion applications in Europe journal January 2013
Neutron-induced transmutation effects in W and W-alloys in a fusion environment journal March 2011
Operating temperature windows for fusion reactor structural materials journal November 2000
Phase diagram and lattice instability in tungsten–rhenium alloys journal April 2000
First-principles study of the phase stability and the mechanical properties of W-Ta and W-Re alloys journal May 2014
An integrated model for materials in a fusion power plant: transmutation, gas production, and helium embrittlement under neutron irradiation journal August 2012
Temperature dependence of helium-implantation-induced lattice swelling in polycrystalline tungsten: X-ray micro-diffraction and Eigenstrain modelling journal October 2015
Materials for plasma facing components of fusion reactors journal June 2006
The effect of helium implantation on the deformation behaviour of tungsten: X-ray micro-diffraction and nanoindentation journal March 2018
Lattice swelling and modulus change in a helium-implanted tungsten alloy: X-ray micro-diffraction, surface acoustic wave measurements, and multiscale modelling journal May 2015
Simulations of weak-beam diffraction contrast images of dislocation loops by the many-beam Howie–Basinski equations journal October 2006
Non-Contact Measurement of Thermal Diffusivity in Ion-Implanted Nuclear Materials journal November 2015
Positron annihilation spectroscopy investigation of vacancy clusters in silicon carbide: Combining experiments and electronic structure calculations journal April 2014
Automated indexing for texture and strain measurement with broad-bandpass x-ray microbeams journal November 1999
Three-dimensional X-ray structural microscopy with submicrometre resolution journal February 2002
Competing Kinetics and He Bubble Morphology in W journal March 2015
Modelling self trapping and trap mutation in tungsten using DFT and Molecular Dynamics with an empirical potential based on DFT journal December 2014
Micro-beam Laue alignment of multi-reflection Bragg coherent diffraction imaging measurements journal August 2017
Improving atomic displacement and replacement calculations with physically realistic damage models journal March 2018
High-energy collision cascades in tungsten: Dislocation loops structure and clustering scaling laws journal August 2013
An object Kinetic Monte Carlo Simulation of the dynamics of helium and point defects in tungsten journal March 2009
Effect of Alloy Composition & Helium ion-irradiation on the Mechanical Properties of Tungsten, Tungsten-Tantalum & Tungsten-Rhenium for Fusion Power Applications journal January 2013
SRIM – The stopping and range of ions in matter (2010)
  • Ziegler, James F.; Ziegler, M. D.; Biersack, J. P.
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 268, Issue 11-12 https://doi.org/10.1016/j.nimb.2010.02.091
journal June 2010
The three-dimensional X-ray crystal microscope: A new tool for materials characterization journal July 2004
X-ray micro-beam characterization of lattice rotations and distortions due to an individual dislocation journal November 2013
Full local elastic strain tensor from Laue microdiffraction: simultaneous Laue pattern and spot energy measurement journal July 2011
Full elastic strain and stress tensor measurements from individual dislocation cells in copper through-Si vias journal September 2015
Diffraction post-processing of 3D dislocation dynamics simulations for direct comparison with micro-beam Laue experiments journal December 2012
Evaluation of residual stresses and strains using the Eigenstrain Reconstruction Method journal June 2010
Analysis of strain error sources in micro-beam Laue diffraction
  • Hofmann, Felix; Eve, Sophie; Belnoue, Jonathan
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 660, Issue 1 https://doi.org/10.1016/j.nima.2011.09.009
journal December 2011
A multi-scale model for stresses, strains and swelling of reactor components under irradiation journal September 2018
Achromatic nested Kirkpatrick–Baez mirror optics for hard X-ray nanofocusing journal May 2011
Fabrication of nested elliptical KB mirrors using profile coating for synchrotron radiation X-ray focusing journal January 2012
Elastic Constants of Single‐Crystal Mo and W between 77° and 500°K journal July 1962
Elastic Constants of Tantalum, Tungsten, and Molybdenum journal May 1963
Strains in light-ion-implanted polycrystals: influence of grain orientation journal July 2012
Trapping and release of helium in tungsten journal September 2011
Stability and mobility of rhenium and osmium in tungsten: first principles study journal September 2014
The role of interstitial binding in radiation induced segregation in W-Re alloys journal July 2016
Effect of Rhenium on the Dislocation Core Structure in Tungsten journal May 2010
Effect of rhenium irradiations on the mechanical properties of tungsten for nuclear fusion applications journal August 2016
Suppression of radiation-induced point defects by rhenium and osmium interstitials in tungsten journal November 2016
Ion-irradiation induced clustering in W-Re-Ta, W-Re and W-Ta alloys: An atom probe tomography and nanoindentation study journal February 2017
Mechanism of nucleation and incipient growth of Re clusters in irradiated W-Re alloys from kinetic Monte Carlo simulations journal September 2017
Simulating irradiation hardening in tungsten under fast neutron irradiation including Re production by transmutation journal February 2018
Hardening of self ion implanted tungsten and tungsten 5-wt% rhenium journal January 2013
Saturation of deuterium retention in self-damaged tungsten exposed to high-flux plasmas journal January 2012
The microstructure of tungsten exposed to D plasma with different impurities journal August 2017
Effect of sputtering on self-damaged recrystallized W mirror specimens journal March 2013

Cited By (4)

Recent advances in characterising irradiation damage in tungsten for fusion power journal November 2019
Hardening and Strain Localisation in Helium-Ion-Implanted Tungsten journal December 2019
Orientation-dependent indentation response of helium-implanted tungsten journal June 2019
Hardening and Strain Localisation in Helium-Ion-Implanted Tungsten journal January 2019