Destruction processes of large stacking fault tetrahedra induced by direct interaction with gliding dislocations

Y. Matsukawa; Yu N. Osetsky; R. E. Stoller; S. J. Zinkle

doi:10.1016/j.jnucmat.2006.02.003

Destruction processes of large stacking fault tetrahedra induced by direct interaction with gliding dislocations

Y. Matsukawa, Yu N. Osetsky, R. E. Stoller, S. J. Zinkle

Microstructural Evolution Modeling

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Abstract

The destruction process of large non-truncated stacking fault tetrahedra (SFTs) induced by gliding dislocations was examined by in situ transmission electron microscope straining experiments. Three different destruction processes were observed: a triangular Frank loop remained after the collapse (Type 1), the whole SFT was incorporated into a gliding dislocation as multiple super jog segments (Type 2), and an apex portion of the original SFT remained as a smaller SFT while the base portion was annihilated (Type 3). The remnants of Type 1 and 2 destruction processes were similar to those of previous models proposed by Kimura, indicating that these processes are based on dislocation reactions as assumed in Kimura models. On contrary, the Type 3 process, which was entirely different from Kimura models, is occasionally accompanied by vacancy migration.

Original language	English
Pages (from-to)	285-294
Number of pages	10
Journal	Journal of Nuclear Materials
Volume	351
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jnucmat.2006.02.003
State	Published - Jun 1 2006

Funding

This research was sponsored by Office of Fusion Energy Sciences, US Department of Energy, under contract DE-ACO5-00OR22725 with UT-Battelle, LLC. We are grateful to Ms Kathy Yarborough for specimen preparation, Mr Cecil Carmichael for furnace operation for heat treatments, and Dr Neal Evans for maintenance of TEM. The authors also thank Dr B.N. Singh, Risø National Laboratory, for valuable discussions and comments.

Funders	Funder number
U.S. Department of Energy	DE-ACO5-00OR22725
Fusion Energy Sciences

Keywords

D0400
E0300

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10.1016/j.jnucmat.2006.02.003

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Destruction processes of large stacking fault tetrahedra induced by direct interaction with gliding dislocations

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