Softening due to Grain Boundary Cavity Formation and its Competition with Hardening in Helium Implanted Nanocrystalline Tungsten
Abstract
The unique ability of grain boundaries to act as effective sinks for radiation damage plays a significant role in nanocrystalline materials due to their large interfacial area per unit volume. Leveraging this mechanism in the design of tungsten as a plasma-facing material provides a potential pathway for enhancing its radiation tolerance under fusion-relevant conditions. In this study, we explore the impact of defect microstructures on the mechanical behavior of helium ion implanted nanocrystalline tungsten through nanoindentation. Softening was apparent across all implantation temperatures and attributed to bubble/cavity loaded grain boundaries suppressing the activation barrier for the onset of plasticity via grain boundary mediated dislocation nucleation. An increase in fluence placed cavity induced grain boundary softening in competition with hardening from intragranular defect loop damage, thus signaling a new transition in the mechanical behavior of helium implanted nanocrystalline tungsten.
- Authors:
-
[3];
[1]
- Stony Brook Univ., NY (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Middle East Technical Univ., Ankara (Turkey)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1423975
- Report Number(s):
- LA-UR-17-26895
Journal ID: ISSN 2045-2322
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Cunningham, W. Streit, Gentile, Jonathan M., El-Atwani, Osman, Taylor, Chase N., Efe, Mert, Maloy, Stuart A., and Trelewicz, Jason R.. Softening due to Grain Boundary Cavity Formation and its Competition with Hardening in Helium Implanted Nanocrystalline Tungsten. United States: N. p., 2018.
Web. doi:10.1038/s41598-018-20990-1.
Cunningham, W. Streit, Gentile, Jonathan M., El-Atwani, Osman, Taylor, Chase N., Efe, Mert, Maloy, Stuart A., & Trelewicz, Jason R.. Softening due to Grain Boundary Cavity Formation and its Competition with Hardening in Helium Implanted Nanocrystalline Tungsten. United States. https://doi.org/10.1038/s41598-018-20990-1
Cunningham, W. Streit, Gentile, Jonathan M., El-Atwani, Osman, Taylor, Chase N., Efe, Mert, Maloy, Stuart A., and Trelewicz, Jason R.. Tue .
"Softening due to Grain Boundary Cavity Formation and its Competition with Hardening in Helium Implanted Nanocrystalline Tungsten". United States. https://doi.org/10.1038/s41598-018-20990-1. https://www.osti.gov/servlets/purl/1423975.
@article{osti_1423975,
title = {Softening due to Grain Boundary Cavity Formation and its Competition with Hardening in Helium Implanted Nanocrystalline Tungsten},
author = {Cunningham, W. Streit and Gentile, Jonathan M. and El-Atwani, Osman and Taylor, Chase N. and Efe, Mert and Maloy, Stuart A. and Trelewicz, Jason R.},
abstractNote = {The unique ability of grain boundaries to act as effective sinks for radiation damage plays a significant role in nanocrystalline materials due to their large interfacial area per unit volume. Leveraging this mechanism in the design of tungsten as a plasma-facing material provides a potential pathway for enhancing its radiation tolerance under fusion-relevant conditions. In this study, we explore the impact of defect microstructures on the mechanical behavior of helium ion implanted nanocrystalline tungsten through nanoindentation. Softening was apparent across all implantation temperatures and attributed to bubble/cavity loaded grain boundaries suppressing the activation barrier for the onset of plasticity via grain boundary mediated dislocation nucleation. An increase in fluence placed cavity induced grain boundary softening in competition with hardening from intragranular defect loop damage, thus signaling a new transition in the mechanical behavior of helium implanted nanocrystalline tungsten.},
doi = {10.1038/s41598-018-20990-1},
journal = {Scientific Reports},
number = 1,
volume = 8,
place = {United States},
year = {2018},
month = {2}
}
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Hydrogen and helium trapping in tungsten under single and sequential irradiations
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Size dependent enhancement of helium ion irradiation tolerance in sputtered Cu/V nanolaminates
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He ion irradiation damage in Fe/W nanolayer films
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Formation of helium induced nanostructure ‘fuzz’ on various tungsten grades
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Anomaly in dependence of radiation-induced vacancy accumulation on grain size
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TEM observation of the growth process of helium nanobubbles on tungsten: Nanostructure formation mechanism
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A full tungsten divertor for ITER: Physics issues and design status
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Strength and ductility improvement of ultrafine-grained tungsten produced by equal-channel angular pressing
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Primary radiation damage near grain boundary in bcc tungsten by molecular dynamics simulations
journal, March 2015
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Helium bubble formation in ultrafine and nanocrystalline tungsten under different extreme conditions
journal, March 2015
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- Journal of Nuclear Materials, Vol. 458
Low energy helium ion irradiation induced nanostructure formation on tungsten surface
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journal, March 2009
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Defect-interface interactions
journal, October 2015
- Beyerlein, I. J.; Demkowicz, M. J.; Misra, A.
- Progress in Materials Science, Vol. 74
Nanostructured metals under irradiation
journal, June 2009
- Wurster, Stefan; Pippan, Reinhard
- Scripta Materialia, Vol. 60, Issue 12
Molecular dynamics simulation study of the effect of grain size on the deformation behavior of nanocrystalline body-centered cubic iron
journal, March 2011
- Jeon, Jong Bae; Lee, Byeong-Joo; Chang, Young Won
- Scripta Materialia, Vol. 64, Issue 6
Microstructure refinement of tungsten by surface deformation for irradiation damage resistance
journal, January 2014
- Efe, Mert; El-Atwani, Osman; Guo, Yang
- Scripta Materialia, Vol. 70
Is Stress Concentration Relevant for Nanocrystalline Metals?
journal, June 2011
- Kumar, Sandeep; Li, Xiaoyan; Haque, Aman
- Nano Letters, Vol. 11, Issue 6
Direct Observation of Sink-Dependent Defect Evolution in Nanocrystalline Iron under Irradiation
journal, May 2017
- El-Atwani, O.; Nathaniel, J. E.; Leff, A. C.
- Scientific Reports, Vol. 7, Issue 1
Grain-size dependence of plastic deformation in nanocrystalline Fe
journal, June 2003
- Jang, D.; Atzmon, M.
- Journal of Applied Physics, Vol. 93, Issue 11
Enhanced radiation tolerance in nanocrystalline MgGa2O4
journal, June 2007
- Shen, Tong D.; Feng, Shihai; Tang, Ming
- Applied Physics Letters, Vol. 90, Issue 26
Morphology of micro-cavities in nickel during Helium bombardment and post-irradiation annealing
journal, April 1988
- Niwase, K.; Ezawa, T.; Fujita, F. E.
- Radiation Effects, Vol. 106, Issue 1-2
Radiation damage near grain boundaries
journal, October 2003
- Samaras, M.; Derlet, P. M.; Van Swygenhoven†, H.
- Philosophical Magazine, Vol. 83, Issue 31-34
Designing Radiation Resistance in Materials for Fusion Energy
journal, July 2014
- Zinkle, S. J.; Snead, L. L.
- Annual Review of Materials Research, Vol. 44, Issue 1
Measurement of hardness and elastic modulus by instrumented indentation: Advances in understanding and refinements to methodology
journal, January 2004
- Oliver, W. C.; Pharr, G. M.
- Journal of Materials Research, Vol. 19, Issue 1
Irradiation damage of single crystal, coarse-grained, and nanograined copper under helium bombardment at 450 °C
journal, October 2013
- Han, Weizhong; Fu, E. G.; Demkowicz, Michael J.
- Journal of Materials Research, Vol. 28, Issue 20
Works referencing / citing this record:
Interface Effects on He Ion Irradiation in Nanostructured Materials
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