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Temperature aspects of pulsed ion bombardment in an austenitic alloy [electronic resource].

Published
Oak Ridge, Tenn. : Oak Ridge National Laboratory, 1983.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: 7 : digital, PDF file
Additional Creators
Oak Ridge National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The influence of pulsed ion irradiation to a damage level of 10 dpa at temperatures from 843 to 1023/sup 0/K has been studied in a quaternary Fe-17Cr-17Ni-2.5Mo austenitic alloy. Pulsing periods of either 60 s on/60 s off or 1 s on/1 s off were used, together with continuous bombardment as a control. Helium (200 appM) was supplied either by simultaneous or room temperature preimplantation, or omitted. While most specimens experienced only 2 to 3/sup 0/K temperature fluctuations with the beam pulses, certain specimens were deliberately allowed to undergo 15 to 50/sup 0/K variations. Pulsed irradiation effects were found to range from little effect at 843/sup 0/K, through a notable modification in the relationship between helium and cavity parameters at 938/sup 0/K (near the peak swelling temperature), to a substantial reduction of swelling at 1023/sup 0/K. The influence of the simultaneous temperature excursions compared with constant-temperature pulsed ion bombardment (mostly compared at 843/sup 0/K) was small. These results are interpreted in terms of the effects of pulsing and helium on the stability of cavities at high temperatures through the critical size and number of gas atoms needed for a small cavity to begin bias-driven void growth.
Report Numbers
E 1.99:conf-830942-63
conf-830942-63
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
01/01/1983.
"conf-830942-63"
"DE84003382"
3. topical meeting on fusion reactor materials, Albuquerque, NM, USA, 19 Sep 1983.
Packan, N.H.
Funding Information
W-7405-ENG-26
View MARC record | catkey: 14753474