A comparative TEM study of in-reactor and post-irradiation tensile tested copper

Janne Pakarinen (Corresponding Author), Seppo Tähtinen, B.N. Singh

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

The deformation microstructures of oxygen-free high-conductivity (OFHC) copper were examined by transmission electron microscopy (TEM) following in-reactor and post-irradiation slow strain rate tensile tests. The TEM results suggest that the main modes of deformation differ between all examined cases. Plastic deformation appeared predominantly localized in the defect-free cleared channels following post-irradiation testing and hardly any dislocations were seen outside the channels. The microstructures following in-reactor tests were characterized by a small amount of cleared channels and a distinct dislocation density within the matrix. However, the dislocations observed following in-reactor testing did not seem to interact with each other, whereas that was the main mode of deformation in the non-irradiated reference sample. The possible mechanisms of plastic deformation are discussed based on the experimental results
Original languageEnglish
Pages (from-to)S821-S825
JournalJournal of Nuclear Materials
Volume442
Issue number1-3 suppl.1
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed
EventFifteenth International Conference on Fusion Reactor Materials - Charleston, United States
Duration: 16 Oct 201122 Oct 2011

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Copper
reactors
Irradiation
Transmission electron microscopy
copper
transmission electron microscopy
plastic deformation
irradiation
Plastic deformation
microstructure
Microstructure
Testing
tensile tests
strain rate
Strain rate
Oxygen
conductivity
Defects
defects
oxygen

Cite this

Pakarinen, Janne ; Tähtinen, Seppo ; Singh, B.N. / A comparative TEM study of in-reactor and post-irradiation tensile tested copper. In: Journal of Nuclear Materials. 2013 ; Vol. 442, No. 1-3 suppl.1. pp. S821-S825.
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abstract = "The deformation microstructures of oxygen-free high-conductivity (OFHC) copper were examined by transmission electron microscopy (TEM) following in-reactor and post-irradiation slow strain rate tensile tests. The TEM results suggest that the main modes of deformation differ between all examined cases. Plastic deformation appeared predominantly localized in the defect-free cleared channels following post-irradiation testing and hardly any dislocations were seen outside the channels. The microstructures following in-reactor tests were characterized by a small amount of cleared channels and a distinct dislocation density within the matrix. However, the dislocations observed following in-reactor testing did not seem to interact with each other, whereas that was the main mode of deformation in the non-irradiated reference sample. The possible mechanisms of plastic deformation are discussed based on the experimental results",
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A comparative TEM study of in-reactor and post-irradiation tensile tested copper. / Pakarinen, Janne (Corresponding Author); Tähtinen, Seppo; Singh, B.N.

In: Journal of Nuclear Materials, Vol. 442, No. 1-3 suppl.1, 2013, p. S821-S825.

Research output: Contribution to journalArticleScientificpeer-review

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AB - The deformation microstructures of oxygen-free high-conductivity (OFHC) copper were examined by transmission electron microscopy (TEM) following in-reactor and post-irradiation slow strain rate tensile tests. The TEM results suggest that the main modes of deformation differ between all examined cases. Plastic deformation appeared predominantly localized in the defect-free cleared channels following post-irradiation testing and hardly any dislocations were seen outside the channels. The microstructures following in-reactor tests were characterized by a small amount of cleared channels and a distinct dislocation density within the matrix. However, the dislocations observed following in-reactor testing did not seem to interact with each other, whereas that was the main mode of deformation in the non-irradiated reference sample. The possible mechanisms of plastic deformation are discussed based on the experimental results

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