Formation of Helium Porosity in Different Materials during Post-Radiation Annealing

The characterisitics of the development of helium porosity in bcc and fcc alloys and structural steel after irradiation with 40-keV He^sup +^ up to dose 510^sup 20^ m^sup -2^ at 20°C and subsequent annealing at 650°C for 1 h and 5 h are studied by transmission electron microscopy. It it found that u...

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Published inAtomic energy (New York, N.Y.) Vol. 99; no. 2; pp. 550 - 555
Main Authors Binyukova, S. Yu, Chernov, I. I., Kalin, B. A., Vin, M'o Khtet
Format Journal Article
LanguageEnglish
Published New York Springer Nature B.V 01.08.2005
Subjects
Annealing
Free surfaces
Helium
Irradiation
Metallurgy
Nickel
Porosity
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Summary:The characterisitics of the development of helium porosity in bcc and fcc alloys and structural steel after irradiation with 40-keV He^sup +^ up to dose 510^sup 20^ m^sup -2^ at 20°C and subsequent annealing at 650°C for 1 h and 5 h are studied by transmission electron microscopy. It it found that under these conditions smaller bubbles with high density are formed in bcc than in fcc materials. It is shown that for an annealing time of 5 h higher porosity is formed in all materials, except nickel, than with 1 h annealing. This is due to the inflow of thermal vacancies from the free surface. The data obtained are discussed from the standpoint of the formation of various helium-containing complexes, their thermal stability, and the diffusion mobility of the matrix atoms.[PUBLICATION ABSTRACT]
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:1063-4258
1573-8205
DOI:10.1007/s10512-005-0245-z