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In-Situ Irradiation Studies on the Effects of Helium on the Microstructural Evolution of V-3.8Cr-3.9Ti

Published online by Cambridge University Press:  15 February 2011

N. Doraiswamy ,
B. Kestel  and
D. E. Alexander
N. Doraiswamy
Affiliation:
Materials Science Division, Argonne National Laboratories, Argonne, IL 60439.
B. Kestel
Affiliation:
Materials Science Division, Argonne National Laboratories, Argonne, IL 60439.
D. E. Alexander
Affiliation:
Materials Science Division, Argonne National Laboratories, Argonne, IL 60439.
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Abstract

The role of helium on the microstructural evolution of V-3.8Cr-3.9Ti has been investigated by in-situ transmission electron microscopy observations of as-prepared and He implanted (<10 appm) samples subjected to 200keV He irradiation at room temperature. Quantitative analysis of the defects showed an increase in the defect density and size with irradiation in both types of samples. The unimplanted sample showed a defect density consistent with electron irradiation experiments. In comparison, the He preimplanted sample had slightly larger defects and a substantially greater increase in the number density of defects. This result is consistent with a mechanism of He trapping by the formation of He-vacancy-X (X= C, N, O) complexes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 439: Symposium B – Microstructure Evolution During Irradiation , 1996 , 337
Copyright
Copyright © Materials Research Society 1997

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