Show/Hide Menu
Hide/Show Apps
anonymousUser
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Videos
Videos
Thesis submission
Thesis submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Contact us
Contact us
Unprecedented irradiation resistance of nanocrystalline tungsten with equiaxed nanocrystalline grains to dislocation loop accumulation
Date
2019-02-01
Author
El-Atwani, O.
Esquivel, E.
Aydoğan Güngör, Eda
Martinez, E.
Baldwin, J. K.
Li, M.
Uberuaga, B. P.
Maloy, S. A.
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
1
views
0
downloads
Cite This
Nanocrystalline metals are often postulated as irradiation tolerant materials due to higher grain boundary densities. The efficiency of these materials in mitigating irradiation damage is still under investigation. Here, we present an in-situ transmission electron microscopy with ion irradiation study on equiaxed 35 nm grained tungsten (NCW-35 nm) and compare its radiation tolerance, in terms of dislocation loop damage, to several other grades of tungsten with different grain sizes at two temperatures (RT and 1073 K). The NCW-35 nm was shown to possess significant higher radiation tolerance in terms of loop damage. As demonstrated by Kinetic Monte Carlo simulations, at least part of the higher radiation tolerance of the small grains is due to higher interstitial storage (at the grain boundaries) and defect recombination (in the grain interiors) in the small grain material. In addition, experimental observations reveal rapid and efficient dislocation loop absorption by the grain boundaries and this is considered the dominant factor for mass transport to the boundaries during irradiation, enabling the remarkable radiation tolerance of 35 nm grained tungsten. This study demonstrates the possibility of attaining high radiation tolerant materials, in terms of dislocation loop damage, by minimizing grain sizes in the nanocrystalline regime. Published by Elsevier Ltd on behalf of Acta Materialia Inc.
Subject Keywords
Electronic, Optical and Magnetic Materials
,
Polymers and Plastics
,
Metals and Alloys
,
Ceramics and Composites
URI
https://hdl.handle.net/11511/69916
Journal
ACTA MATERIALIA
DOI
https://doi.org/10.1016/j.actamat.2018.11.024
Collections
Department of Metallurgical and Materials Engineering, Article
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
O. El-Atwani et al., “Unprecedented irradiation resistance of nanocrystalline tungsten with equiaxed nanocrystalline grains to dislocation loop accumulation,”
ACTA MATERIALIA
, vol. 165, pp. 118–128, 2019, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/69916.