Effects of neutron radiation on the fatigue and creep/fatigue behavior of Type 308 stainless steel weld metal at elevated temperatures Page: 2 of 26
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EFFECTS OF NEUTRON RADIATION ON THE FATIGUE AND CREEP/FATIGUE
BEHAVIOR OF TYPE 308 STAINLESS STEEL WELD METAL AT ELEVATED TEMPERATURES
G. E. Korth' and M. D. Harper2
ABSTRACT: Results from elevated temperature, strain controlled fatigue
tests with and without hold periods at peak strain-on specimens cut from
Type 304 stainless steel plates welded us;ng Type 308 stainless weld wire
with controlled residual elements (CRE) are reported. Specimens were
irradiated to fluences of 0.1 to 1.1x1022 n/cm2, E>0.1 MeV at 450 and
600 C, while the post-irradiation test temperature was 482 and 593 C
(900 and 1100 F). Irradiation reduced the fatigue life of the weld metal
at 593 C by about one-half in the low cycle region (<5000 cycles to fail),
but cyclic life was equivalent or slightly superior to the unirradiated
material in the higher cycle region (>10,000 cycles to fail). At 482 C
and at the lower fluence, the fatigue behavior of the irradiated specimens
was about equivalent in the low cycle region and superior in the high
cycle region. Introducing tensile hold periods at the peak strain of
each fatigue cycle of the 593 C tests resulted in reductions in the fatigue
life but at a much lesser rate than the base (parent) metal. Irradiation
further reduced the life of the hold time tests. Hold periods had no
'Associate Scientist, Materials Research, Aerojet Nuclear Co., Idaho Falls,
Idaho 83401
2Engineering Aide, Materials Research, Aerojet Nuclear Co., Idaho Falls,
Idaho 83401
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Korth, G.E. & Harper, M.D. Effects of neutron radiation on the fatigue and creep/fatigue behavior of Type 308 stainless steel weld metal at elevated temperatures, article, January 1, 1974; Idaho Falls, Idaho. (https://digital.library.unt.edu/ark:/67531/metadc1022838/m1/2/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.